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This will kind of rambling because my head is starting to spin. I am beginning to think the PO disconnected because he could not figure out what was wrong.
It started when I was working on getting the AC going on my new to me 93 940 (built 7 92). Somehow I got the compressor going from a possibly stuck position. I attempted to refill the system but either my low mechanical aptitude kicked in or there is a big leak. I retreated from that and made an appt at a friend's AC shop to get it going from my progress.
While doing this, the car appeared to overheat with coolant wanting to push out of the overflow. I noticed the fan was not going. I had never had the problem before this time. The only difference between this idling session and others was I had the compressor running via a jumper at the low pressure cut off switch. Is there some correlation?
I have spent quite a bit of time in the FAQ sections. The fan spins freely. I find neither wire going to the temp sensor in the upper right radiator with the engine off or on. I cant jump it from there by connecting it to teh battery direct. jumping both leads together does not do anything. The car did sit for four years. I cleaned the ground on the front wall by the battery. IS there a way to see how the cooling relay is working? (course you have to take the battery out pretty much).
One issue I have with the FAQ, is there are many references to early and late 940's with man important differences in AC and cooling. Is there a way to quantify what the breakoff is?
When I was going over the AC, I found the three switches down on the bottom of the evaporator (the high pressure etc) all disconnected (probably the DPO by my guess. Was he dealing with over heating and sacrificed the AC to keep the car running rather than fix the problem?
Sorry to be so rambling but I have been so involved under the hood of this car that I was getting a headache. I will need to buy beer for lots of people out there when this is done.
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