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Van was heating up have changed thermostat 2x's

Tiny
ANONYMOUS
  • MEMBER
  • 1992 GMC SAFARI
  • 200,000 MILES
Van was heating up have changed thermostat 2x's. Gauge fluctuations into hot zone and back almost so fast you can't see it. How do I change the control switch?
Friday, January 11th, 2013 AT 2:45 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check for a shorted wire, if you are talking about the coolant temp sensor it screws in if you do it while engine cold and are fast you won't loose alot of coolant otherwise drain your system then refull with new coolant. It may also be a bad gauge
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Friday, January 11th, 2013 AT 2:50 PM

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