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FIXITMAN, Master Technician
Category: Subaru
Satisfied Customers: 17368
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2000 Outback started overheating when stopping after

Customer Question

2000 Outback started overheating when stopping after driving. The temperature goes down when driving resumes. The fans do come on! Not to full speed though? The AC starts blowing warm air when coolant temp goes up and returns to cold when the temp goes down. Replace relays or fan motors?
Submitted: 2 years ago.
Category: Subaru
Expert:  FIXITMAN replied 2 years ago.

Hello, my name is Bobby. Thank you for the question. This can be a fan issue if they are not coming on high or it can be caused by a failing thermostat. If it is fine at higher speeds then most of the time it is the fan. Does the fan speed up when the a/c is turned on?

Customer: replied 2 years ago.
Hard to say if it speeds up. They both turn on when ac is turned on or when the car heats up enough. But it is hard to say at which speed. When stopped after driving even with both fans on (but not at max speed?) the temp goes all the way up with or without ac.
Expert:  FIXITMAN replied 2 years ago.

The temperature should not rise that much if they are on at all. You need to replace the thermostat first. If you do not want to replace it as the first step I would do a block test with a test kit from an auto parts store. This engine is notorious of having a leaking head gasket causing this.