Question about 1994 Saab 9000

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1994 9000C Runs hot

New thermostat, fan works. coolant level full.. Starts to run hot in stop and go traffic otherwise temp. gauge holds steady.

Very hot under hood after short runs.

Thanks

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Could be the fan thermoswitch. The thermoswitch, if there is one*, is located on the lower portion of the radiator just in front of the turbo outlet pipe. Here is a picture.
You may also have one of the fan relays failing. (On some cars, there were two relays, one for low speed and one for high). Here is a picture.
For general diagnostics of the cooling system, go here.
2 stage cooling fan wiring diagram here.
This also will tell you where to find other components to check, like the fan speed resistor, and provide other diagnostic checks.

Posted on Dec 17, 2008

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