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I have a 1993 Volvo 940, no turbo. I have searched around the forum and believe I have located my issue.
A/C compressor does not come on. I have tested the freon using the low pressure switch by trying to trip it with a paper clip. No luck. Fan behind the radiator does not come on except for intermitent cooling from the temp sensor on the engine.
I think it is the controller I have read about behind the panel in the dash, and it has been suggested to have it re soldered.
Can someone help with tips on removing the dash panel, etc??
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Pop out trim piece around control, unscrew the four screws holding it, and unplug it from the back. Then open it up and look for the break in the solder.
Thanks Tech
I pulled it out last night...poured through it and could not find any wires loose, etc. Looks real clean. car has 71,xxx miles on it and all connections appear to be good. Obviously I have an electrical problem but may have assumed too much with my original post. Any ideas?
recap: compressor turns fine with mild resistance by hand. Cannot trip low pressure sensor on accumulator to kick compressor. Fan on rad. comes on from heat sensor not from a/c switch.
Maybe I did not tear it down far enough to see. A pic might help. Thanks!
OK here they are.
Once you have it out of the car and the black cover off you will see this. Remove the 4 screws the arrows point to.
Then flip it over and remove the 2 screws (Red arrows)
The slide the circuit board out and flip over.
Then check the solder joints that I have the screwdriver by and the arrows.
(Sorry about the quality of the pics.Spend $300.00 for a new camera and pics suck. Use my camera that is 8 years old same brand as new one and quality is a ton better)
Those are the joints that normally go bad.
__________________
1987 Ford mustang LX Coupe 5.0
1995 Yellow T5-RM yes Manual
1996 850 turbo
Thanks Tech
Your pictures were invaluable. After tearing it all down all of the solder is in tact. No signs at all of wear or burn.
Are there any inline fuses or anything I should check before I run to the shop with it?
Thanks
last question Tech, I promise
should I remove the old solder before putting the new on or do I just drip a small amount over the existing solder. Kinda looks like in the pic you provided I would just add some new over the old. I really appreciate your help!
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A/C Controller
