2007 monte carlo ls

2007 CHEVROLET MONTE CARLO
56,355 MILES • 6 CYL • FWD • AUTOMATIC
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PUNKDOG63
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Heater in my car works sometimes.
Car has to move for heater to get warm/hot. What could it be???
Dec 6, 2010 at 12:58 PM
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JACOBANDNICKOLAS
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Have you checked to make sure the coolant level is full? Also, is the engine running at a normal operating temp?
Dec 6, 2010 at 1:34 PM
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CHILLY53
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Did you ever find out what was causing this? Same thing just started happening in my 2005 Monte Carlo.
Dec 8, 2010 at 2:31 AM
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PUNKDOG63
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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??????
Dec 8, 2010 at 4:36 AM
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JACOBANDNICKOLAS
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It sounds like low coolant or an air block.
Dec 8, 2010 at 5:49 PM
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PUNKDOG63
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Jacobandnickolas,
Thanks so much for the help. My coolant is good. Where can I begin to check for the air block issues??
Dec 8, 2010 at 7:30 PM
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JACOBANDNICKOLAS
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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.
Dec 9, 2010 at 12:58 AM