Quote:
Originally Posted by joe_pau
Thanks slk230red! The aux fan does work for temp control and not the high side pressure. Just as you described. Is the high pressure switch easily replaceable? My understanding is you have to drain the system before replacing the switch. What do you know about that? I have read where someone tried to replace it and they sent all the freon into the atmosphere!
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Are you still using R12?
With the engine running with the ac on, will the aux. fan operate if you short the 2 wires at the switch on the drier? This will verify that the aux. fan wiring circuit is good.
Yes, you have to evacuate the refrigerant, replace the switch, vacuum the system, and recharge. While you're at it, you might want to replace the drier/receiver and replace both switches.
Option 2: Some guys have used the aux. fan switch connector at the drier/receiver to install a manual switch inside the car to operate the aux. fan when needed. Something you could do until your a/c need other repairs, then you could replace the pressure switch at that time. Just a thought.
08-16-2015, 03:58 PM
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