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No heat?

Tiny
ELIZABETH NICHOL-MANN
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 238,000 MILES
My A/C works, fans work on all speed settings, car does not overheat, blower motor works. But I have no heat. Just blows cold air.
Monday, October 3rd, 2022 AT 6:50 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,489 POSTS
First with the engine cold check the coolant level, With the engine hot, see if the heater hoses are hot as well, if not you may have a clogged heater core, or the temperature blend door actuator is not working.

here is a guide to help you with the temperature blend door actuator location in the diagrams below:

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

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

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Monday, October 3rd, 2022 AT 3:44 PM
Tiny
ELIZABETH NICHOL-MANN
  • MEMBER
  • 2 POSTS
Coolant level is okay, heater hoses get hot too. Just no heat gets into the car.
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Monday, October 3rd, 2022 AT 7:58 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,489 POSTS
Yep, this means the temperature blend door actuator is not working, I would change it out.
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Tuesday, October 4th, 2022 AT 2:23 PM

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