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93 940t no heat, electronic servo question 900

posted by  ohsotired on  Tue Dec 29 10:25 CST 2009
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last visit: Tue May 31 00:15 CST 2011
[RELATED]

For whatever reason, the servo that opens the door to the heater core is not functioning on my car. I replaced it, and it still does not work. It is not controlled by vacuum. It has a connection with four wires coming off it.

Are there any relays that control this, or is it 4 wires straight off the climate control unit? I swapped out the ccu with a spare, and it did not help. When i had the servo off, I manually opened the door, and I got plenty of heat.






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