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Registered
Join Date: Oct 2008
Posts: 46
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964 90' oil cooler and AC fan constantly running
I searched a lot on the forum but can't find a solution. As soon as I turn my key, thet oil cooler fan and ac condensor front fan starts running at full speed.. Wiring loom looks good and oil sensor is connected.
I have another 964 from 89' so I switched the relay R04 en R14, problem stay's the same. The CCU form the 964, I have put in the other 964 and if I turn the key the fans starts spinning. I did notice the other 964 had a CCU with a 993 partnumber and the modification in the wiring loom (Workshop Manual S.87-27). So this my mislead. What can I test next ? Last edited by 924ttturbo; 02-10-2020 at 10:51 PM.. |
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01-30-2020, 11:17 AM
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Join Date: Oct 2013
Location: Prescott, AZ
Posts: 1,062
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How about the temperature sensor in the oil cooler itself? It seems to me that the problem might be a bad sensor or perhaps wires that are damaged and somehow shorting to ground.
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1990 964 Coupe 1986 Carrera 3.2 Targa |
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01-30-2020, 04:31 PM
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Registered
Join Date: Oct 2008
Posts: 46
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I checked:
- oil temperature sensor - ok - relay's - both ok - wiring - ok - restistors - both ok So I think the problem is in the CCU. As soon as unplug the CCU the fans stop spinning. Has anybody got a wiring diagram of the inside of the CCU ? Or tips what could be the problem ? |
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02-10-2020, 10:50 PM
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