When do I Turn on defrost the AC runs?
When I turn on the defrost the AC runs, which at subzero temps is really counter productive and just plain cold. Can I disconnect the AC in the winter? Are there makes of cars that don't work this way? I know my Honda … When I turn on the defrost the AC runs, which at subzero temps is really counter productive and just plain cold.
How does a defroster work on an A / C heater?
The normal operation of the defroster is for the outside air is drawn into the a/c heater inlet with the system in the defrost position. When the system is in the defrost position the a/c compressor comes on and the air is drawn in and sent through the a/c evaporator to remove moisture from the air before it is sent through the heater core.
Why does the defroster run warmer than the ambient temperature?
You have a compressor that takes a gas and converts it into a liquid. Then when that liquid is converted back into a gas at the evaporator, it’s released at a certain temperature. So, the temperature coming out the vents is warmer than the ambient temperature. People in the know in Minnesota do this if the AC system has a compressor button.
Why is my defroster not running in my car?
It’s not counterproductive. The AC removes moisture from the incoming air in order to keep the windows clear from fogging up. There are temps where the AC won’t run, the pressure switches and sensors will take care of that and turn off the compressor if the system is in danger of icing up. BillRussell January 22, 2017, 6:17pm #4 not all cars…
When I turn on the defrost the AC runs, which at subzero temps is really counter productive and just plain cold. Can I disconnect the AC in the winter? Are there makes of cars that don’t work this way? I know my Honda … When I turn on the defrost the AC runs, which at subzero temps is really counter productive and just plain cold.
It’s not counterproductive. The AC removes moisture from the incoming air in order to keep the windows clear from fogging up. There are temps where the AC won’t run, the pressure switches and sensors will take care of that and turn off the compressor if the system is in danger of icing up. BillRussell January 22, 2017, 6:17pm #4 not all cars…
Why is my AC not running in Sub Zero?
If you remove the relay that controls the compressor clutch, the AC won’t run. In sub zero, the AC should not be running anyway because the computer controls the AC compressor clutch. Air temperature is one of the inputs it uses to decide whether to run the compressor or not.
You have a compressor that takes a gas and converts it into a liquid. Then when that liquid is converted back into a gas at the evaporator, it’s released at a certain temperature. So, the temperature coming out the vents is warmer than the ambient temperature. People in the know in Minnesota do this if the AC system has a compressor button.