The fan will operate at all engine temps, but you have to stop the car, shut it down and after a restart the hot air will come out and after about five minutes will slowly go back to cold air. I can repeat this shut down business as many times as I want and it will go to cold and never put out hot air again until a shut down has been done, and even then the air temp is only warm and the temp gauge is showing 80C ???????
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Originally Posted by sixto
The temp sensor behind the front plate only goes to the LCD temp display in the dash. The outside temp sensor for the ACC is along the firewall near the wiper motor. There is a cold engine cut-off temp sensor on the head but this delays high blower speed, not heat. It's so you don't get a full rush of cold air first thing in the morning.
Please be more specific about "the heater will not work." No air, no hot air, no hot air from the expected registers?
Sixto
95 S420
87 300SDL
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