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Radiator fan runs for a long time when car switched off 900 1993

posted by  volvo426 on  Sun Feb 8 20:59 CST 2015
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last visit: Thu Oct 23 13:44 CST 2014
[RELATED]

My car is 93 940 4 cylinder with bosch ignition.
With the a/c on on hot days i turn the ignition off and the electric radiator cooling fan will continue to run for about 3 minutes before tuning off.I have noticed that if i turn the ignition on and off the fan will turn off, its intermittent. Things i have done i changed the fan relay and it didn't help. When the fan was running i pulled the connections off the 3 A/C pressure switches (violet,brown, grey)and the two temp sensors off the side of the engine and the fan still wouldn't stop.
I had a spare ignition switch and radio suppressor relay and put those on and it didn't help. Any suggestions could i have a bad solder joint in the A/c control panel at the dash that could be causing the problem.






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