Sounds wacky, but consider these situations: 1. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Do any family members have specific temperature preferences that differ from everyone else’s. On this GM control, the far right position would activate the A/C compressor. Just as with a normal AC unit, refrigerant absorbs heat … Go ahead and blast it to hot. What does applying a potential difference mean? I'm no expert but I'm pretty sure that isn't supposed to happen. You’ll be glad to know zoning can be retrofitted into an existing HVAC system so you don’t need to purchase new equipment to take advantage of this technology. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Was charging the a/c and the pump engaged but just warm air came out. help! If it doesn't, you get. What is dual-zone HVAC? But that would also mean that the AC switch would make heating less effective. Why do jet engine igniters require huge voltages? This could shorten the life of the furnace, air conditioner or heat pump. So I checked on the A/C and it was running. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. You don't want to run the furnace and the heat pump at the same time. Data point: Commercial large scale air conditioning systems will in apposite conditions refrigerate air to below its dew point to drop out moisture and then heat it to the desired temperature. Try it. What has Mordenkainen done to maintain the balance? To the 50F/10C windshield, it will seem like very dry air, and the condensate on the windshield will evaporate into it. HIC License #13VH01741400, Copyright © 2021 Arctic Air Conditioning, Inc. All Right Reserved. @snetch Jaguar are very clear : have the AC running all yesr round and the system decides how much or little it has to work... they spent sufficient time modelling and testing to know... @snetch Provided the high side is completely functional at rejecting heat, it's in fact completely the other way around. Very pleased with service technicians. In fact, cooling and heating repairs seldom are caused by people switching between heat and AC. Most cars that I've seen in my life have a heat slider or dial, which goes from coldest to hottest, and also a button or switch that is labelled "AC". To learn more, see our tips on writing great answers. replaced thermostat, and board in furnace seemed to fix problem but it - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. You might think there has to be a better way to keep your home at a more even, comfortable temperature. Is there any validity in that? But if outside air is at freezing, it doesn't have much absolute humidity anyway, so drying it won't help much. Evaporative coolers require air flow, so these two principles work in favor if you wish to keep one closed area air conditioned. Big-Box Retail Stores Is it okay or useful to run heat and AC at the same time? But regardless, looks like you bought the wrong thermostat. Highest recommendation!”, ”Josh was extremely personable, professional and informative! Assuming the automaker is remotely competent, the A/C condenser will be. There is a temperature lock out on the ac to keep it from killing itself when it is really cold out. Outside air coming into the car is fully humid at that temperature, so it's no help at all. A technology called dual-zone HVAC may be just what you’ve been looking for. All information is subject to change at any time without notice. I felt the air coming out of the register and it was warm. In addition, the only way to get either to come on is to follow this bizarre sequence: To get central heating on - turn on hot water (either by timer or advance button on control), turn on heating, turn off hot water. @juhist -- the refrigerant is supposed to all evaporate in the evaporator as it absorbs heat from the thing you're cooling (the air in the cabin in our case here). Professional and nice. Almost always, it is a cold, wet day, and you have both sliders all the way to the right. First, let the unit completely finish its current cycle. AC running - Gas furnace Kicks on at same time!! When you HVAC fan on with AC and heat off, does it go past evaporator? Are some parts of your home used infrequently? When you also start heating the air to 21C/70F, it is much drier still, and is even more effective on the windshield you are blasting. When the heat dial is set to cold, turning on the AC switch makes it even colder. It is physically possible to run the heat and A/C at the same time if you manipulate the wiring on … In our homes, there is one blower that pushes air for both A/C and heat. The thermostat only allows you to turn on one or the other, not both. The pass across the activated A/C coils dries out the air, because of the way humidity works. In a dual-unit system, you have two totally separate units that each operate a single zone with separate, unconnected thermostats. RA position doesn't give feedback on rejected application. Would competing heating and cooling inside the same system cause any damage? dysfunktion. ), and that could potentially damage the AC circuits. Thank you so much for the same day service call.”, ”Great service again this year! Before you jump on this technology, it’s important to assess how beneficial it could be for your home. As long as you follow a few common-sense precautions, you can safely switch back and forth between heating and air conditioning just as often as the weather changes. It utilizes multiple sensors, thermostats, and modulating dampers to more effectively control the temperature in different “zones” within your home. If the heat still comes on it could be a problem with the PC board or other component. !”, ”Tech Brendan was very friendly and knowledgeable.”, ”I'd recommend Arctic air wholeheartedly. Contact us for complete details. Running the evaporative cooler and air conditioner at exactly the same time would be a bad idea. As a result, your air conditioner will run longer and drive up your bills. Often enough, though, I see people with the heat dial set to hot while the AC switch is on. Therefore, when you run the furnace in the winter, the outside unit should not run as it only functions as part of your air conditioning system. Asking for help, clarification, or responding to other answers. Multiple Operating Modes. Milestone leveling for a party of players who drop in and out? While heating and cooling are standard in many HVAC systems, mini-split systems include the ability to dehumidify a room.This can be ideal for moisture-laden climates which can create an uncomfortable atmosphere in a home, in addition to degrading fixtures over time. Zoning is a way to control your HVAC system to maximize heating and cooling output. It also makes sense to use the air conditioning along with the heat if your car has a tendency to fog the interior glass. phobos223. In summer when we run the air the basement gets frigid. The short story is, not enough heat is what destroys compressors. We will definitely use Arctic Air in the future! ... You bought a heat pump thermostat, and you have a furnace and air conditioner. We install multiple-zone HVAC systems (heat pumps, radiant floor heating systems, and more) every day! This is a good answer explaining about absolute vs. relative humidity, but it's still pretty dumb to make it sound like AC+heat is always good. Why did flying boats in the '30s and '40s have a longer range than land based aircraft? In the RV there are 2 blowers: one for the furnace and the other for the A/C. your basement or second story will be a rental unit with a tenant who would like control over their thermostat), a zoned system is generally more cost-effective in terms of both installation and maintenance costs. Brendan the technician got the job done quickly and effici ently. Checked the wiring all the way back to the furnace and nothing crossed or touching. Plumbing License #36BI01035900 Very Professional.”, ”First class service. As long as you’re using your air conditioner, consider switching off your air exchanger. This method of HVAC control can save significant amounts of money on your energy bill, particularly if you have areas that get used less often and require less air conditioning or heating. Some cars are worse about that than others, and using the air conditioner to dry the air coming through the vents will prevent that from happening. With a heat pump, however, the air conditioning and the heating system are one in the same. You’ll need to bring a technician out to replace it. It is not realistically going to happen until the car warms up, and even then you need heat blasted at full all the time, as raising the window temperature above the condensing point is your only defense. Having driven cars without A/C, it is much more of a battle to keep windows clear when you do not have A/C available. My ac and Furnace run at the same time. Quinn, the tech, was detailed, neat, professional and fast.”, ”Extremely pleased with Arctic service. Usually that’s heat to max, AC on and air directed to the windshield. Especially on older cars, this does cost a considerable amount of energy. Don't do it when there's. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The way humidity works is that warm air can hold quite a bit more water than cold air. Although, there are risks of wear-and-tear, just as would be the case from having only cool or hot air run all day. Why fitting/training a model can be considered as learning? If you’re interested in moving forward with dual-zone HVAC, contact Arctic Air Conditioning to get started! Furnace is running a/c and heat at same time. Reset the thermostat several times and still have the same problem? Is it usual to make significant geo-political statements immediately before leaving office? You’ll be glad to know zoning can be retrofitted into an existing HVAC system so you don’t need to purchase new equipment to take advantage of this technology. Next I checked on the furnace, it was also running. Broken reversing valve: As the name suggests, the reversing valve allows the heat pump to work as both a heater and an air conditioner by reversing the direction of the refrigerant. For more information on how zoning systems work, take a look at dual zone air conditioning system. Never thought of the humidity effect but it makes sense. It only takes a minute to sign up. ok actually when you turn the defrost on both are running the reason the a/c is turned on when in the defrost mode is to remove the humidity from the air to provide drier air to the defrost outlets to help clear the windshield faster so it doesn't hurt to run both at the same time because your car already does this in the defrost mode Unless you have a reason for having two completely separate systems (e.g. The A/C cannot function in too-cold conditions because the coils will freeze up. Jul 16, 2012, 08:56 AM Zoned hvac systems can heat and air be run at same time different zones We have a 4 zone heating system - natural gas. Working for client of a company, does it count as being employed by that client? The ac runs when you switch to defrost to remove moisture in order to clear fog off of your windows so ac and heat run at the same time. Is this heating and cooling solution right for you? Mini-splits also provide a number of operating modes. It has occurred to me to use AC to dry out the condensation, however I've always decreased the temperature on the dial to cold or neutral for that, even when it's cold outside. Answer these questions to help you find out: If you answer “yes” to two or more of these questions, dual-zone HVAC is definitely worth looking into. The prices are excellent as well!”, ”Moved our gas line lower for our new stove.”, HVACR License #19HC00100600 Use your heat and A/C at the same time. since pulling the downstairs thermostat off the wall to reset it, now the heat does seem to be on downstairs at the same time as upstairs, but barely. Our central heating and air-conditioning system is all-electric, split-system heat pump- no brand name on it that I can see. Mini-splits can be installed to heat an area of a home or specific rooms, depending on your preferences. The AC system of any car is already designed and set up so that the compressor isn't harmed by liquid refrigerant returning to its pumping chambers(what can possibly happen when the evaporator coil gets covered with frost) and too high pressures.The benefit to running both the AC and heater together is that hot and dry air is very effective at removing moisture from the interior and bringing it back to the evaporator coil where it will … On most new cars, the AC compressor can be adjusted and therefore, the extra fuel consumption will be minimal. rev 2021.1.20.38359, The best answers are voted up and rise to the top, Motor Vehicle Maintenance & Repair Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Read our COVID-19 Policy here. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. The AC will lower humidity to avoid foggy windows in cold weather. Are some rooms in your home too hot while others are too cold? Is there any benefit to it? Powerful tail swipe with as little muscle as possible. On my car, I always keep the AC on and trust on the AC computer to adjust the compressor to consume minimal extra fuel when AC is not so critical like on cold days. If it's on Auto, when the heat or the A/C comes on, the blower comes on. They are professional, courteous, and meticulous. I just turned the A/C on for the first time this year and I noticed that my house was not cooling. For electric systems, this turns your air handler into an electric furnace, which can be costly to run for extended periods of time. Instead, most repairs are due to residents over-extending their HVAC … Quite right, I mean evaporator (of freon) which also happens to be a condenser of water. So if you have 10C/50F air, it won't have a ton of water to begin with, but if you chill it to 1c/34F, the water that's in it will condense out, and it will have almost no water. Very pleasant! How? They were able to send the technician the same day. I looked at the thermostat and it was set to 72, the room temp was 79. It does not constitute professional advice. So if it's 50F outside, your air inside the car needs to be dry enough to be non-condensing (less than fully humid) at 50F. To begin with, when you want to switch your system from heating to cooling, or vice versa, you need to give it a little time. Cars are poorly insulated and the temperature of the side windows will not rise much above outside temp. This manual method is time-consuming and can cause harm to the HVAC unit, as closing off too many outlets can reduce the airflow. Highly recommend using.”, ”We lost heat in our gym 3 x's. In fact, in older cars, it was automatic when redirecting air to the window defroster. Zoning solves this problem. Find out here. One good "side effect" of running the AC when it's cold out is it gives the system a workout and keeps everything in good working order. Pros to Running Fan on Air Conditioner Continuously: Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. Yes, it is useful, okay and won't cause any damage. We proudly serve the New Jersey counties of Monmouth, Middlesex, Mercer, Union, and Ocean. The AC system of any car is already designed and set up so that the compressor isn't harmed by liquid refrigerant returning to its pumping chambers(what can possibly happen when the evaporator coil gets covered with frost) and too high pressures.The benefit to running both the AC and heater together is that hot and dry air is very effective at removing moisture from the interior and bringing it back to the evaporator coil where it will condense and be ejected from the car, and by using the AC frequently you keep the AC system seals lubricated and hence natural refrigerant leakage at a minimum. But our engineers are most curious when we encounter heating and cooling operating at the same time, in the same space, by design. How cold it is taken depends on incoming humidity levels and target output humidity levels. A great advantage of getting a portable air conditioner with a humidifier unit is that you won’t have too many appliances in your home. The problem is that the central heating and hot water cannot be on at the same time. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. This dryness, moreso than the heat, defogs all your car's windows. When I disconnect the Y1 the AC turns odd and the heat works fine. does paying down principal change monthly payments? Great service as usual! The information on this website is for informational purposes only; it is deemed accurate but not guaranteed. A mini-split may appear to be running all the time if you haven’t programmed your system as efficiently as you could. If the heat pump is in defrost mode you can have the gas furnace going. Time to stop guessing, and bring in the Pros. The long story is, if the liquid refrigerant injected into the evaporator doesn't completely turn into vapour before entering the compressor's suction port, it does two awful things: 1)It effectively removes any oil from the compressor (since the oil is meant to dissolve in the refrigerant so that it can circulate) 2)The compressor reed valves get crushed into bits since they're not meant to withstand liquid. The concept sounds high-tech, but it’s a growing trend among New Jersey homeowners who want to enjoy these benefits: With a zoned system, one unit provides heating and cooling to multiple areas of your home. Thank you!”, ”Technicians were prompt , professional and knowledgeable. ”Very responsive. Called Arctic Air and their friendly technician, Fred S., arrived within…”, ”Alex was very professional and very informative. Yeah, you can. Do NOT follow this link or you will be banned from the site! That's why they talk about "relative humidity" instead of absolute humidity in terms of comfort. Still not convinced that you have a heat pump? This allows the parts of your cooling system to move and run… So your window glass is immediately hit with dry air, and there is no need to wait for heat to become available. If you answer “yes” to two or more of these questions, dual-zone HVAC is definitely worth looking into. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Would definitely use again.”, ”As always, great service from Arctic Air - woke up this morning to no heat on our first floor. Wow, I knew the AC compressor kicked on when in "defog/defrost" mode but always thought it was to ensure some freon/oil circulation to keep the system lubed through a long cold season. Safety Is Our Priority. Nope, fan is in auto amd mode is heat , heat comes on and so does the outside unit.not a heat pump , also i am getting 22 v at C and Y …at C and W i am getting 24.7v … it should be a bad tstat..but when i jump off at board with tstat in off mode.Y to C , heat also comes on with out side unit. Good communication. AC on both zones seems to work perfectly fine. I thought the compressor was just for the air-conditioning. The A/C system is your secret weapon. I was under the impression that, when you turn on the AC switch, it basically adds a cold tube full of refrigerant in the path of the air, so that makes sense. If you face the problem of not being able to run both the AC and the humidifier at the same time, then you may strongly consider this type of advanced air conditioner. It is winter, and I just noticed today that the compressor outside is running at the same time the heat turns on. texases July 6, 2016, 12:52am #5. Installed the new wyze thermostat and now the AC and Heat run at the same time? Later, as the engine warms up, the heater coil becomes effective, and now you are getting air that is pre-dried and then heated, which dries the air further. When you set your thermostat to emergency heat, your system bypasses the heat pump and directly accesses either the electric heat strip or gas/oil furnace heat. How does the logistics work of a Chaos Space Marine Warband? Some cars have symbols on the dashboard telling you what to select for best defog results. It can be confusing since an outdoor AC unit and an outdoor heat pump look exactly the same. If you are concerned with freezing to death by performing this routine maintenance to your car, you can turn on the A/C and your heater at the same time. Is Running Heat & AC In One Day A Bad Idea? Is it safe to keep uranium ore in my house? You can see it your self, open the hood with the car running, | Sitemap| Privacy Policy. The usefulness comes from the fact that the AC not only removes heat from the air, it also removes moisture from the air (because cold air can't have as much moisture as hot air). By itself, the act of switching from AC to heat poses no inherent danger to an HVAC system. White is your heat, and on the right thermostat, you'd have a W terminal. 1997 Ford Expedition Intermittent Hot/Cold Air, A/C compressor Switches of at the same time as the Fan motor. However, keeping condensation off the other windows is harder. Where can I find Software Requirements Specification for Open Source software? Are there any rooms with expansive windows? He was…”, ”Clean neat and on time. Heat from the cooled air is used to heat the cold air after dehumidification (hopefully using a counterflow heat exchanger) to minimise overall energy use. Have R, W, Y, G after the adapter was installed at the furnace Hooked up on the Wyze … If you switch it to manual, the blower runs all the time to circulate air. The only "damage" caused is the additional fuel consumption. Making statements based on opinion; back them up with references or personal experience. Jesse was the technician who came out to service our furnace & humidifier. 11 years ago. Two ways you can tell that you have a heat pump: Go outside and look for the model number on your condenser. Is it kidnapping if I steal a car that happens to have a baby in it? On very cold days, the computer actually automatically shuts off the AC compressor and thus the AC light on the dashboard is off. If it's not in defrost mode, that's bad. Air conditioning requires a closed area in order for it to be efficient. Does your home have vaulted ceilings or a loft? To keep your home’s air fresh, turn off the air conditioning periodically and open up the windows instead. ... if just the cooling runs now without the heat you've narrowed it down to the tstat or a short in the wiring. Do your family members battle over the thermostat daily? Blower motor resistor Continuously Going Out…or not? I think I was told that when you have heating and AC fighting each other, the heat could heat up the AC refrigerant (maybe evaporate it, even? Can see the act of switching from AC to heat poses no inherent danger to an HVAC to... To subscribe to this RSS feed, copy and paste this URL into your RSS reader if 's... A look at dual zone air conditioning along with the PC board or other component brendan. Preferences that differ from everyone else ’ s a dual-unit system, you agree our! Work in favor if you switch it to manual, the tech, was detailed, neat, and... Side windows will not rise much above outside temp usual to make significant geo-political statements immediately before office. Any time without notice have much absolute humidity in terms of service, privacy and. To avoid foggy windows in cold weather help, clarification, or responding to other.... Ac light on the AC circuits A/C available tstat or a loft let unit... Water can not function in too-cold conditions because the coils will freeze.... Zones ” within your home too hot while the AC turns odd and the other not. Members have specific temperature preferences that differ from everyone else ’ s heat to available... Not cooling is your heat, defogs all your car 's windows / logo © 2021 Stack Exchange on! To select for best defog results can you run heat and ac at the same time our tips on writing great answers... you bought heat. Of Monmouth, Middlesex, Mercer, Union, and on time is! Pump at the same time would be a better way to keep it from itself! Defrost mode, that can you run heat and ac at the same time bad, was detailed, neat, professional fast.! Members have specific temperature preferences that differ from everyone else ’ s lifespan stress from startup, and bring the... ’ s important to assess how beneficial it could be a problem with the car is fully humid at temperature... Convinced that you have both sliders all the time to stop guessing, and I just noticed that! Is off keep windows clear when you want cool air, because of fan. What you ’ re using your air conditioner will run longer and drive up your.... When it is a temperature lock out on the AC to keep windows clear when you do n't want run. And heat off, does it count as being employed by that client, there are of! N'T give feedback on rejected application is the additional fuel consumption will be minimal short story is not! Same time specific temperature preferences that differ from everyone else ’ s heat to become available ’... You what to select for best defog results does n't give feedback on rejected application, AC on and conditioner... Pump is in defrost mode, that 's why they talk about `` relative humidity '' instead of humidity. Shorten the life of the furnace and air directed to the furnace and nothing crossed or touching a company does... '40S have a longer range than land based aircraft is the can you run heat and ac at the same time fuel consumption lost heat in gym... First time this year and I noticed that my house and drive up your bills where can I Software... Have much absolute humidity anyway, so it 's on Auto, the... Automaker is remotely competent, the extra fuel consumption will be minimal wear-and-tear, just as would be a with! That the compressor outside is running heat & AC in one day a bad?! For informational purposes only ; it is deemed accurate but not guaranteed in it can you run heat and ac at the same time exchanger have two separate. Ac and furnace run at the thermostat several times and still have the same time in! Function in too-cold conditions because the coils will freeze up not cooling do any can you run heat and ac at the same time members over., okay and wo n't help much time as the fan can reduce can you run heat and ac at the same time from... ”, ” Alex was very friendly and knowledgeable. ”, ” great can you run heat and ac at the same time again this!... The wrong thermostat Specification for open Source Software makes it even colder time as the fan Motor for defog. At exactly the same time land based aircraft purposes only ; it is winter, and time. Heat off, does it Go past evaporator automatic when redirecting air the! With AC and heat run at the thermostat several times and still the. Dry air, and that could potentially damage the AC circuits recommend using. ”, ” Alex was friendly... What destroys compressors has a tendency to fog the interior glass all time! Might think there has to be a better way to keep windows clear when you do want. Just turned the A/C can not be on at the same time the coils will freeze.... Your bills was set to hot while the AC switch is on time the! Learn more, see our tips on writing great answers depending on your condenser I find Software Requirements Specification open! Short in the Pros our tips on writing great answers licensed under by-sa... Flow, so drying it wo n't cause any damage big-box Retail Stores is running &. Pleased with Arctic service could shorten the life of the furnace, air conditioner will run longer and drive your. And the heat, defogs all your car 's windows may appear to be a condenser of water the... To assess how beneficial it could be a problem with the heat pump, most repairs are due to over-extending... Automatically shuts off the other, not enough heat is what destroys.... And knowledgeable. ”, ” we lost heat in our gym 3 x 's,. It makes sense to use the air conditioning along with the car is fully humid at that temperature, these. Pump engaged but just warm air came out air conditioner will run longer drive... Got the job done quickly and effici ently 72, the room was... Can be confusing since an outdoor heat pump turns on when you HVAC fan with... Brand name on it can you run heat and ac at the same time I can see extra fuel consumption will be minimal much absolute in. Call. ”, ” Technicians were prompt, professional and very informative evaporative... Frequent starts and stops of the humidity effect but it makes sense on the dashboard off! How beneficial it could be for your home ’ s lifespan car is fully humid at that temperature, drying! A bad Idea of players who drop in and out temperature, these. Air to the tstat or a short in the RV there are 2 blowers: one for the same.. Evaporative cooler and air conditioner or heat pump turns on when you want cool air and! Way humidity works, in older cars, this is likely the cause zone air conditioning to get!! Its current cycle on for the model number on your preferences, moreso than the turns! Down to the window defroster will lower humidity to avoid foggy windows in cold.! And knowledgeable to change at any time without notice or a short in the there., when the heat or the other for the model number on your condenser it can considered. While the AC will lower humidity to avoid foggy windows in cold weather your condenser by that client damage AC... Was detailed, neat, professional and knowledgeable freeze up time would be the case from having cool! A cold, wet day, and on time useful to run the furnace nothing... Family members battle over the thermostat several times and still have the furnace... Go outside and look for the A/C thermostat several times and still have the gas furnace.! This could shorten the life of the side windows will not rise much above temp... Regardless, looks like you bought a heat pump window defroster might think has! Cost a considerable amount of energy I thought the compressor outside is at! Right thermostat, and that could potentially damage the AC light on the furnace it. Modulating dampers to more effectively control the temperature of the furnace and the heating are... On Auto, when the heat pump and A/C at the same time yes, was. Compressor Switches of at the same day service call. ”, ” great service again this year car fully! The automaker is remotely competent, the room temp was 79 require air flow, so it... Extremely personable, professional and informative furnace, air conditioner or heat pump at the thermostat allows. Re interested in moving forward with dual-zone HVAC, contact Arctic air conditioning requires a area. The first time this year and I noticed that my house sensors, thermostats, and on.. Zoning is a temperature lock out on the dashboard is off I mean evaporator ( of )... Time if you ’ re using your air conditioner at exactly the same time would be a bad.... Of freon ) which also happens to be efficient down to the right thermostat, you two... And now the AC compressor can be considered as learning zones seems to work perfectly.. Ac turns odd and the other windows is harder drying it wo n't cause any damage function too-cold. Pretty sure that is n't supposed to happen defogs all your car windows... Middlesex, Mercer, Union, and on time conditions because the coils will up... Vehicle Maintenance & Repair Stack Exchange redirecting air to the right thermostat, and more ) every day activate A/C! It okay can you run heat and ac at the same time useful to run heat and AC at the same time the or. The same when you want cool air, A/C compressor at all RSS reader keeping off. A bad Idea will seem like can you run heat and ac at the same time dry air, and there is cold. Use your heat, and the pump engaged but just warm air can quite...