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I replaced my water pump thermostat and radiator on a 1992 Mercedes Benz sl500. Put it all back together and when I start it the fans constantly run with car running and my climate control guages are not working. My a/c compressor is not working and I have bypassed the pulley.

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Just a couple of thoughts.

First I know that on some European cars when you remove and replace the radiator and or water pump the front of the car has to elevated some to "burp" the air out of the system while filling. i don't know if that would contribute to the problem but worth checking. If the level is down there may be a sensor on the radiator that is not being properly completed.

Second is or was there one or two sensors that were switched to the new radiator? Possible damage? I don't know but there are switches that operate the fans when the ac is off and when the ac is on. Could be related?

Good Luck!

Posted on Dec 08, 2014

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