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  #1  
Old 08-30-2002, 11:27 PM
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Join Date: Mar 2001
Location: Accokeek, MD
Posts: 683
Blower Control Buttons

The control buttons do not seem to be working properly. For example when I push the "O" off button The blower turns off but comes on again after just a few seconds. It remains off only if I hold the button in tight manually. I can hear a click behind the dash when I operate the button and the blower turns off or on.

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Earl



1993 190E 2.3
2000 Toyota 4x4 Tundra
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  #2  
Old 08-30-2002, 11:47 PM
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Join Date: Mar 2001
Posts: 326
Commonly the pushbutton assembly is at fault when this occurs. Have it checked out before replacing. Not a cheap part.
HTH
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Scott Diener
89 300E
93 300E
92 Volvo 740 Wagon aka "Mutt mover"
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  #3  
Old 08-31-2002, 09:52 PM
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Join Date: Mar 2001
Location: Accokeek, MD
Posts: 683
Repaired Temperature Control Module

Well I found the problem about why I was geting such erratic behavior from my heat and air conditioning system. I took the Temperature Control Module out and then carefully disassembled it. Quite a tedious task if working without a manual. I removed the control wheel, the button covers and the top circuit board and discovered that two of the pins for the reostats (one pin on the heat reostat and a second pin on the air reostat) that are controlled by the temerature wheel had broken lose from the printed circuit board.
I soldered the pins back onto their circuits and the system now works as well as the day it came out of the factory.

The trickiest part was removing the wheel. It is held on by a plastic axile that looks like a flat head screw but it is actually a groved pin that slides out rather than turn out.

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Earl



1993 190E 2.3
2000 Toyota 4x4 Tundra
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