Fan/Heater/AC switch operation

........plus I want to know what actually is the trigger for the rear condenser fan. I can (with the a/c dial clicked on), hear the compressor engage.

Bob

Look in your red Owners manual for the settings for the various air deflectors for best results.They are entirely manual so have nothing to do with the running of the system, only where the air comes out. The on/off for the magnetic clutch is the AC rotary switch on the rt side of the console, which also powers up the rear fan on the condenser. A corroded connection in back may prevent this fan from running, which then overpressures the AC and blows a hose off. Some people add ann overpressure switch to this circuit to protect the system The console 'Fan' switch simply turns on the blower that moves air through the AC evaporator under the dash.

Jack........ That was the answer I was looking for. (THANK YOU!). I was not sure if the rotary switch just engaged the clutch on the a/c ONLY, or did more. The conderser fan didnt come on, so I will check further.


Bob

On my system, the rear fan had a bad ground connection to the body. I also disconnected the multipin connector back there & sprayed it out with Radio Shack Contact Cleaner. Use this stuff on any connectors in any circuiit giving grief, before replacing parts- sometimes we get lucky.

Checked the functions yesterday.

1) Fan switch position#1 - nothing (end-of-story)
2) Fan switch position#2 - fan, heater light in dash, rear ac condenser fan on.
3) Fan switch position#2 & A/C on - compressor on, condenser fan on, inside fan on, heater light on.

So looks like fan switch in position#1 I have A) no FAN light in dash and B) no FAN actuation.

Suggestions? (or comments)......seems strange that the condenser fan will turn on w/o a/c dial turned on.


Bob