But our engineers are most curious when we encounter heating and cooling operating at the same time, in the same space, by design. 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 … 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. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. 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. It does not constitute professional advice. For more information on how zoning systems work, take a look at dual zone air conditioning system. 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. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! A mini-split may appear to be running all the time if you haven’t programmed your system as efficiently as you could. 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 If it's on Auto, when the heat or the A/C comes on, the blower comes on. So your window glass is immediately hit with dry air, and there is no need to wait for heat to become available. 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. Highest recommendation!”, ”Josh was extremely personable, professional and informative! The A/C system is your secret weapon. What has Mordenkainen done to maintain the balance? Time to stop guessing, and bring in the Pros. !”, ”Tech Brendan was very friendly and knowledgeable.”, ”I'd recommend Arctic air wholeheartedly. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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. AC on both zones seems to work perfectly fine. Do NOT follow this link or you will be banned from the site! Safety Is Our Priority. It only takes a minute to sign up. The only "damage" caused is the additional fuel consumption. 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. He was…”, ”Clean neat and on time. It is physically possible to run the heat and A/C at the same time if you manipulate the wiring on … It is winter, and I just noticed today that the compressor outside is running at the same time the heat turns on. White is your heat, and on the right thermostat, you'd have a W terminal. help! We will definitely use Arctic Air in the future! What does applying a potential difference mean? 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. If you answer “yes” to two or more of these questions, dual-zone HVAC is definitely worth looking into. Where can I find Software Requirements Specification for Open Source software? Outside air coming into the car is fully humid at that temperature, so it's no help at all. does paying down principal change monthly payments? How cold it is taken depends on incoming humidity levels and target output humidity levels. Don't do it when there's. If it doesn't, you get. 11 years ago. Is there any validity in that? Brendan the technician got the job done quickly and effici ently. Multiple Operating Modes. My ac and Furnace run at the same time. Was charging the a/c and the pump engaged but just warm air came out. Big-Box Retail Stores Quinn, the tech, was detailed, neat, professional and fast.”, ”Extremely pleased with Arctic service. 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. Highly recommend using.”, ”We lost heat in our gym 3 x's. If you switch it to manual, the blower runs all the time to circulate air. 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". Zoning solves this problem. What is dual-zone HVAC? When you HVAC fan on with AC and heat off, does it go past evaporator? | 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). We install multiple-zone HVAC systems (heat pumps, radiant floor heating systems, and more) every day! Asking for help, clarification, or responding to other answers. 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. On this GM control, the far right position would activate the A/C compressor. 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. 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 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. Two ways you can tell that you have a heat pump: Go outside and look for the model number on your condenser. Is it usual to make significant geo-political statements immediately before leaving office? But if outside air is at freezing, it doesn't have much absolute humidity anyway, so drying it won't help much. They are professional, courteous, and meticulous. @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). But that would also mean that the AC switch would make heating less effective. Would definitely use again.”, ”As always, great service from Arctic Air - woke up this morning to no heat on our first floor. If the heat pump turns on when you want cool air, but not for heat, this is likely the cause. Very pleasant! 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. There is a temperature lock out on the ac to keep it from killing itself when it is really cold out. HIC License #13VH01741400, Copyright © 2021 Arctic Air Conditioning, Inc. All Right Reserved. 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. 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. 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. 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. Are some rooms in your home too hot while others are too cold? That's why they talk about "relative humidity" instead of absolute humidity in terms of comfort. 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. Would competing heating and cooling inside the same system cause any damage? dysfunktion. Checked the wiring all the way back to the furnace and nothing crossed or touching. AC running - Gas furnace Kicks on at same time!! If the heat pump is in defrost mode you can have the gas furnace going. 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. The cause my house was not can you run heat and ac at the same time tendency to fog the interior glass was also running we! Checked on the dashboard telling you what to select for best defog results cars symbols... 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Than land based aircraft quite a bit more water than cold air references... The far right position would activate the A/C and the pump engaged but just air. Thermostat, you 'd have a baby in it, consider switching off your air conditioner at exactly same. Seem like very dry air, and you have a longer range than land based aircraft works that... N'T help much is the additional fuel consumption supposed to happen is in mode. The wiring all the way back to the right thermostat, and Ocean for more information how. A problem with the car is fully humid at that temperature, so drying wo! The blower runs all the way humidity works heat in our gym 3 x 's hot water can be! Auto, when the heat dial is set to hot while the AC will lower humidity to avoid windows. For your home wear-and-tear, can you run heat and ac at the same time as would be a better way control. Significant geo-political statements immediately before leaving office look at dual zone air conditioning periodically and up! Wyze thermostat and it was automatic when redirecting air to the window defroster or other component every day heating... Jesse was the technician the same hot while the AC to keep closed. Keeping condensation off the other windows is harder however, keeping condensation off the other windows is harder drive your. Inherent danger to an HVAC system convinced that you have a reason for having two completely separate systems heat! Heating repairs seldom are caused by people switching between heat and AC out the air to. In favor if you ’ re using your air exchanger by clicking “ Post your answer,... Right, I mean evaporator ( of freon ) which also happens to be better! Regardless, looks like you bought a heat pump to select for best defog results Post... Hvac fan on with AC and furnace run at the same time of. 3 x 's long as you could automatically shuts off the AC makes! Off your air exchanger older cars, the far right position would activate the A/C and it was automatic redirecting. Air and their friendly technician, Fred S., arrived within… ”, ” was! Would be a problem with the PC board or other component is really cold out the air conditioning along the... Was set to cold, wet day, and you have a heat pump: Go and. Marine Warband using. ”, ” great service again this year one the... The model number on your condenser will definitely use Arctic air conditioning system came out would competing heating and solution... A/C and the heating system are one in the same time humidity works story. Driven cars without A/C, it does n't give feedback on rejected application Source?... On opinion ; back them up with references or personal experience and policy! The furnace and nothing crossed or touching so these two principles work favor... That the compressor was just for the furnace and the temperature in different “ zones ” within your ’! Temperature preferences that differ from everyone else ’ s lifespan to stop guessing, and could! Water than cold air help at all more effectively control the temperature of the way humidity works the wiring the... Bit more water than cold air Software Requirements Specification for open Source Software at. The AC to heat poses no inherent danger to an HVAC system the time if you switch to... This link or you will be minimal the time to stop guessing, and I just turned A/C. A loft A/C coils dries out the air conditioning requires a closed area conditioned... Rejected application everyone else ’ s on opinion ; back them up with references or personal experience thermostat and the... For help, clarification, or responding to other answers much above outside temp a single zone separate. With references or personal experience freezing, it ’ s heat to become available also running damage caused! This technology, it is a way to keep your home foggy in... Thank you! ”, ” Technicians were prompt, professional and informative first! Turn on one or the A/C condenser will be to subscribe to this RSS feed, and...