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Wierd AC Problem on 91 740: Suggestions?

posted by  Mike242GT on  Fri Nov 11 12:03 CST 2005
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last visit: Thu Nov 4 15:39 CST 2010
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There is a printed circuit board in the control unit in the dash. It suffers from the same bad solder issues as the fuel pump relay. The symptoms are as you describe; intermittent compressor engagement. If you're careful, it can be repaired in the same way - by looking for cracks in the soldered connections with a magnifying glass, then reflowing the solder at those connections with a soldering iron. I had this happen to both a 740 and a 940. I was able to fix the 740, but I believe I got a bit carried away with the soldering iron on the circuit board from the 940 and fried something. Had to order a new control unit from FCP Groton (around $250 as I recall).
--
Mike W., 3 240s, a 740T and a 940T, Largo, FL






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New Wierd AC Problem on 91 740: Suggestions?
posted by  chrisjul subscriber  on Fri Nov 11 07:15 CST 2005 >


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