2007 Monte Carlo LS

Tiny
PUNKDOG63
  • MEMBER
  • 2007 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 56,355 MILES
Heater in my car works sometimes.
Car has to move for heater to get warm/hot. What could it be?
Monday, December 6th, 2010 AT 12:58 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Have you checked to make sure the coolant level is full? Also, is the engine running at a normal operating temp?
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Monday, December 6th, 2010 AT 1:34 PM
Tiny
CHILLY53
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  • 1 POST
Did you ever find out what was causing this? Same thing just started happening in my 2005 Monte Carlo.
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Wednesday, December 8th, 2010 AT 2:31 AM
Tiny
PUNKDOG63
  • MEMBER
  • 3 POSTS
Coolant okay, temp is normal. Friend has same issue with Chevy Trail Blazer (just started). I can be setting idle and give it the gas and the heater will start to heat up?
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Wednesday, December 8th, 2010 AT 4:36 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It sounds like low coolant or an air block.
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Wednesday, December 8th, 2010 AT 5:49 PM
Tiny
PUNKDOG63
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  • 3 POSTS
Jacobandnickolas,
Thanks so much for the help. My coolant is good. Where can I begin to check for the air block issues?
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Wednesday, December 8th, 2010 AT 7:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Check the top of the thermostat housing. There may be a bleeder there. If there isn't, you need to loosten the return line from the heater core to see if air comes out.

Let me know what you find. Also, you may want to consider flushing the heater core if this doesn't help.
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Thursday, December 9th, 2010 AT 12:58 AM

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