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1993 850 ecc burned up , fan on high, need TSB wiring help!

posted by  surfindude on  Mon Feb 28 19:38 CST 2005
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last visit: Wed Jul 2 02:00 CST 2008
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I replaced the resistor pack 2x, 1 didn't work, 1 still only works on high. NO LIGHTS were ever on ecc, I bought car a month ago. There is a TSB # 87812 for ecc wiring, I guess it's for using 1994 up ecc in 93 but can't find out from dealer. I don't want to burn up another one without confirming. This one I took apart to look for bad solder joints, 5 capacitors and the board are are melted! AC starts out COLD , gradually getting warmer and cycling more, but have no contol over it. I'm in Florida, Volvos don't like the heat down here!








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1993 850 ecc burned up , fan on high, need TSB wiring help!

posted by  surfindude on  Thu Mar 3 06:21 CST 2005
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last visit: Wed Jul 2 02:00 CST 2008
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Decided to plug in my FREE ECC module today, now works 100% no flashing, all speeds, AC works great, quiet bolwer motor etc. A system that only works on high can have a BAD ECC module and NOT a blower resistor! The 2nd blower resistor I bought also works fine, I also have a manual br I mistakenly bought at junkyard.







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