Question about 2002 Pontiac Aztek

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No heat my heating and air system only has heat on emergency heat. if i turn it on regular heat it blows cold air. how can i fix this problem so i dont have to run my heat on emergency heat

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  • dottie101 Jan 08, 2009

    Only blows warm air at higher speeds.

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1 Inspect Cooling System Mix Coolant level low or flow is restricted. no heat - grey_line.gif 2 Inspect Thermostat Thermostat stuck closed 3 Inspect Heater Control Valve Leaking or defective heater control valve.

Posted on Dec 04, 2008

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1990 toyota 4runner heater is blowing cold air


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I have a 2007 subaru legacy. it has 17000 miles im having a problem with heating.. when i turn the heat on only driver side blows hot. the pessenger side blows cold even when i turn it on to the winshield...


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I am having/had the same problem. My rear heater has not worked the last 2 winters, still trying to figure that one out. But I think I solved the front heat problem myself. The heater was blowing cold air while idling and hot air when the car was moving.

I jacked up the front of the vehicle, took the cap off of the reserve tank for the radiator, turned the car on and ran the heat (AC off) for 15 minutes. This is supposed to release any air bubbles in the coolant system and I did see air bubbles emerge as I was watching (this might be normal occurance, I'm far from a mechanical expert). Anyway, this did not immediately solve the problem, still blowing cold air as it sat there idling after 15 minutes. Dejected, I put the cap back on, lowered the vehicle and resigned myself to taking it to a dealer.

But a funny thing happened the next day, the coolant level was a lower (no leaks on the floor) so I filled up, and sure enough, when I started the car and let it warm up a little, hot air started coming out of the heater!!!

As far as my wife knows, I fixed the problem for the price of a bottle of coolant, so I am a hero...but at first I thought it didn't work. Here we are a month later and still blowing warm air and haven't had to replace any more coolant...the internet is a wonderful thing!

Hope this works for you, and I hope I can figure out my rear heater problem as well.

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