Originally Posted By: gathermewool
Originally Posted By: duaneb9729
one point that needs to be considered is how the a/c works in the defrost mode, it may very well need the heat in the engine compartment to vaporize the ref. to protect the compressor in the winter.
Good point, but wouldn't the hot air be great at vaporizing the refrigerant?
Normally the evaporator is ahead of the heater core. Outside air normally always goes over the evaporator, whether the A/C is turned on or not, and then depending on the temperature selected it gets diverted across the heater core.
Now if the vehicle has an heater valve I assume the airflow still works the same way, just that as you turn the heat up the heater valve is opened. It might depend on the model though.
Originally Posted By: duaneb9729
one point that needs to be considered is how the a/c works in the defrost mode, it may very well need the heat in the engine compartment to vaporize the ref. to protect the compressor in the winter.
Good point, but wouldn't the hot air be great at vaporizing the refrigerant?
Normally the evaporator is ahead of the heater core. Outside air normally always goes over the evaporator, whether the A/C is turned on or not, and then depending on the temperature selected it gets diverted across the heater core.
Now if the vehicle has an heater valve I assume the airflow still works the same way, just that as you turn the heat up the heater valve is opened. It might depend on the model though.