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Heater not working properly

Tiny
KJONES2009
  • MEMBER
  • 2004 BUICK RENDEZVOUS
  • 87,000 MILES
The heater barely heats up at all and the engine temperature gauge doesn't get halfway, it will barely heat up then fan kicks in and cools it off. Heater core was supposed to have been replaced, previous owners said they changed it and thermostat and water pump. What could be the issue? A stuck thermostat?
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Wednesday, February 23rd, 2022 AT 11:56 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

This sounds like either the wrong thermostat or the new one is no good.

https://www.2carpros.com/articles/car-heater-not-working

I would replace it with a 195-degree thermostat and test.

https://www.2carpros.com/articles/replace-thermostat

I attached the procedure below.

Roy
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Wednesday, February 23rd, 2022 AT 1:50 PM

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