Heater air turns cold - Pontiac G6 Forum
 
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post #1 of 10 (permalink) Old 05-10-2012, 02:47 PM Thread Starter
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Unhappy Heater air turns cold

My G6's heater used to warm up when I'd start the car to warm it up. Now my heater's air turns cold when at stop light or parked. What is causing this and how do I fix it? Thank you!
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post #2 of 10 (permalink) Old 05-10-2012, 04:18 PM
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Sounds like low coolant. Have you checked it?
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post #3 of 10 (permalink) Old 05-10-2012, 04:18 PM
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My G6's heater used to warm up when I'd start the car to warm it up. Now my heater's air turns cold when at stop light or parked. What is causing this and how do I fix it? Thank you!
Your thermostat is probably stuck open. Feel the hose going in the top of the radiator and the one coming out of the bottom. If they feel the same temperature its most likely stuck open.
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post #4 of 10 (permalink) Old 05-11-2012, 12:15 PM Thread Starter
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Sounds like low coolant. Have you checked it?
Yes, I have checked the coolant. The Level was low and I put coolant in and it corrected the problem for a week or so then back to the same cold air at a stop. There isn't any noticeable leaks that I can see....
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post #5 of 10 (permalink) Old 05-11-2012, 01:59 PM
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Yes, I have checked the coolant. The Level was low and I put coolant in and it corrected the problem for a week or so then back to the same cold air at a stop. There isn't any noticeable leaks that I can see....
If the level was low then you have a leak. Could be internal which would not drip onto the ground.



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post #6 of 10 (permalink) Old 05-11-2012, 02:35 PM Thread Starter
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If the level was low then you have a leak. Could be internal which would not drip onto the ground.
If it is an internal leak would the best remedy be to take it into a shop and have it looked at? Thanks for your help Greenman.
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post #7 of 10 (permalink) Old 05-11-2012, 02:52 PM
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I suppose that depends on your experience level. But since you asked I'd say yes. What year is it?



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post #8 of 10 (permalink) Old 05-11-2012, 02:54 PM Thread Starter
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I suppose that depends on your experience level. But since you asked I'd say yes. What year is it?
It is a 2007.
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post #9 of 10 (permalink) Old 05-11-2012, 03:50 PM
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It is a 2007.
Do you know if it's still covered by the 5 yr/100K powertrain warranty?



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post #10 of 10 (permalink) Old 05-11-2012, 09:14 PM
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My leak was a water pump that only leaked when the engine was running, so no leak on the ground that I could see. Engine heat burned it off before it hit the ground. That would be a better than a head gasket. But like greenman said, coolant will only go down if there is a leak.
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