radiator cooling fans
10

Asked by GuruH12HF Jul 24, 2019 at 01:19 PM about the 1990 Chevrolet Lumina Sedan FWD

Question type: Maintenance & Repair

fans not running, fuses, relays and fans all test good. how do I test coolant temp sensor?

2 Answers
26,860

oilyspill answered 4 years ago

Any applicable trouble codes? Some makes and models, if you unplug the coolant temp sensor, the fan will run all the time, it's a default setting, because you unplugged the sensor, the computer doesn't know the engine temp. Some makes and models, if you turn on ac, the fan will run.

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