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940 climate control 900 1994

posted by  spook on  Fri Apr 21 13:29 CST 2006
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last visit: Fri Oct 24 08:06 CST 2014
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Dear rjritterjr,

Good p.m. and may this find you well. The issue with the solder joints in the climate control unit, is that they can fail because of a microscopic crack. Thus, in the original unit - or the refurbished unit - if each of the four contacts between the relay and the circuit board was not re-flowed, the problem could persist. Equally, the 12 pints of the main connector and the circuit board also should be re-flowed.

To reflow the solder, use a max 25-watt iron. Let the iron heat up. Touch the tip to the solder joint for 1-2 seconds. As soon as the solder liquefies, remove the soldering iron tip.

Do not try to figure out which pin has the micro-crack. Do them all. I'd guess this will solve the problem. New/refurbished parts have been known to be faulty.

Hope this helps.

Yours faithfully,

spook






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