Quote:
Originally Posted by project1971
I don't mean to be an a$$ but no im not wrong. it should kick in a high speed or secondary fan too cool it back down from the high pressures. you don't want the condensor running that hot all the time your a/c will not perform properly. The less heat it has to transer the better it will cool. the orfice or expansion valve is what changes the gas state to liquid. NOT saying you can't running that way but would be more efficent especially if running 2 fans or 1 fan with 2 speeds to run the 1 fan or low speed when a/c kicks on and 2nd fan or high speed when a/c pressures get high or engine temp gets too hot.
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Im not trying to be rude but do you know anything about an a/c system?
The purpose of the expansion valve or orfice tube is to meter the flow of the refrigerant. The evaporator is what changes the liguid to gas(hence the word evaporate). The freon leaves the compressor as a high pressure gas and hot, goes through the reciever/drier, then passes through the condensor where it is condensed into a liquid still under high pressure. It's now warm not hot. It then goes through the expansion valve or orifice tube still a liquid, passing through the expansion valve the freon suddenly drops in temp from warm to cold. Then it passes through the evaporator core where the blower fan passes cold air through the fins. The evaporator turns the liquid into a gas so it can re-enter the compressor because we all know liquids can't be compressed.
Now with that said, if you wire the fan to constantly run while the compressor is on, you will shorten the life of the compressor and more than likely the fan. When the refrigerant reaches a high enough pressure the high pressure switch sends a signal to the fan to turn on but it also cuts the clutch off on the compressor. This cycling of the compressor is what the system needs to do to run properly and effecient If your fan is constantly running, the compressor in return will constantly run.
To the original poster of this thread, I suggest running the system like the highly paid engineers designed it run.