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Old 03-20-2006, 03:51 PM
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Join Date: Mar 2006
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Red face 1992 300E A/C Fan Relay

1992 300E 3.0L.
Hi all, I just bought a 92 300E with 132,000 miles. I just got the A/C to work because it was the fan thermostat that was disconected and the fans were on all the time and the A/C did not engage. when I plugged it in the fans turned off and the A/C started to work, but they dont turn on when the A/C is on, only when the engine temp goes over 80. Are they suppose to work like that, or is there a bad relay somewere? Also when the A/C engages the engine wants to stall because it's not accelerating. Anyone got any ideas on how to fix it?

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Old 03-20-2006, 07:24 PM
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Join Date: Dec 2003
Location: Metro Detroit, Michigan
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Some answers

Quote:
Originally Posted by lerrysan
1992 300E 3.0L.
Hi all, I just bought a 92 300E with 132,000 miles. I just got the A/C to work because it was the fan thermostat that was disconnected and the fans were on all the time and the A/C did not engage. when I plugged it in the fans turned off and the A/C started to work, but they don't turn on when the A/C is on, only when the engine temp goes over 80. Are they suppose to work like that, or is there a bad relay somewhere? Also when the A/C engages the engine wants to stall because it's not accelerating. Anyone got any ideas on how to fix it?
Climate Control:
http://www.peachparts.com/shopforum/showthread.php?t=142408


MB Tech Manuals from MBUSA cost $19.99 plus S&H
http://www.peachparts.com/shopforum/showthread.php?t=142445

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