I have a question about the factory Subaru dealer installed A/c on my 86 Brat.  When I initially brought her home, the blower did not run.  To fix, all I did was clean the contacts on the fuse and relay that is attached to a bracket on the passenger strut tower.  It is definitely the genuine Subaru system and not an aftermarket setup.

While I was testing, I noticed that no matter what setting I had the control slider set to, whether it be heat or a/c, the a/c compressor always kicked on.  I dont think this is normal.

Does anyone have any suggestions to troubleshoot?

Edited April 23, 20196 yr by Scoby4wd

If it is similar to my 86 ea82 wagon, it should have a controller.   The acompressor should run for a few seconds when any mode is selected from off.  But only cycle whIle in ac or defrost.  I found mine was running continuously in all modes, due to a hack mod someone had done before I bought it, that caused the compressor to run constantly in all modes.  The FSM helps a lot in figuring out this stuff.

Ok, so maybe my system is running normally.  Ill have to let the heat run for an extended period to see if it is actually cylicng the compressor.  thanks for the info!

So I can confirm the compressor is cycling when set to heat.  Does anyone have a wiring diagram of this system?  I couldn't find any type of controller anywhere, unless it is part of the dash controls.