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Old 03-17-2004, 10:31 AM   #1
Scooby Newbie
Member#: 8939
Join Date: Aug 2001
Location: Warren County, NJ
Default A/C Compressor Questions

I did a search and couldn't find anything on this but what is up with the a/c compressor coming on at weird times such as with the heat
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Old 03-17-2004, 10:41 AM   #2
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Join Date: Feb 2004

One reason is to dehumidify the air to aid in defogging the windows.
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Old 03-17-2004, 10:46 AM   #3
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Join Date: Nov 2003
Location: Dublin, Ca
04 Forester XT
Porsche 914 w. suby six


just keep searching =)

Someone had posted a possible solution here about 2 weeks ago. They had placed a small cooling fan infront of the indash temp sensor to increase the flow of air.

His theory was this; due to a lack of air flow across the temp sensor, the system had a delay in sensing ambient temperature.

Lets say the temp setpoint was 75. If the cabin were being heated, the temperature would sometimes reach 90 before the temp sensor would see 75. At that point the system would stop heating. The sensor would slowly start to read higher temperatures because it is actually 90 degrees in the car. The setpoint is still 75, and measured is 90, so it turns on the AC.

The whole system is goofy, I've stopped using automatic mode. I am looking foreward to trying the cooling fan idea. Even with the fan on high, I can't sense any airflow across the dash sensor. It might also be a good idea to move the sensor out/away from the dash.
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