Question about 1994 Saab 9000
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.
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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Posted on Jan 02, 2017
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For car running hot and overheating issues, I suggest to you go
through this help links. Click this link below and go through the
troubleshooting procedure to take care of the problems: ----
temp gauge goes erratic?
Temperature gauge keeps fluctuating up and
down close to red?
Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?
Car overheats and Air blows hot at idle?
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
Temperature gauge does not move and no heat
when heater is ON?
This details will help.Thanks.
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