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A/C Controller
Bad solder joints in the A/C controller can stop the system completely. Very good with pictures of the offending parts.
Q
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??
A
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.
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Last Updated on May 25, 2021
2 Comments
93 volvo 940 A/C compressor will not come on when switch is deprest. almost postive 134 A is ok.
Just repaired the ECC unit on my 92 940. compressor would not run. Examination of the ECC board revealed a dry joint on the Pressure controller switch. Reran the solder joint, presto the AC works fine.