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post #1 of 12 (permalink) Old 11-12-2013, 08:34 PM Thread Starter
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Question Heat Not Working

I have an 06 cobalt ls and the heat stopped working. At first I thought it was the climate control unit, replaced but still nothing. None of the buttons for defrost light up or the air won't pump out the vents, it sounds like the air just lightly comes out of the front vents near the windshield. Any other ideas for some quick checks I can do to see if I can fix it?
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post #2 of 12 (permalink) Old 11-12-2013, 08:59 PM
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Does the car overheat? Do you have coolant? I worked on an '03 Civic SI once with a similar problem. Customer complained he had no heat, and the car ran rough. We worked out that he had a leaking headgasket, and that coolant was leaking into one of the cylinders causing a misfire. In such a case you might notice white exhaust smoke coming from the tail pipe. It might be worth a look.

If the blower itself isn't turning, check the fuse. Always a good place to start. The interior fuse box is located on the passenger side footwell, where your left foot would rest. You should see what looks like a fuse with a lightning bolt through it. There's also a box under the hood with the red + battery terminal sticking up through it. Good luck.

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post #3 of 12 (permalink) Old 11-12-2013, 10:26 PM
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That sucks. This is a bad time of year to be without heat. My Oldsmobile heater went out a couple years ago, and I still haven't been able to get it fixed, so I know what it's like.
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post #4 of 12 (permalink) Old 11-13-2013, 03:28 AM Thread Starter
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Does the car overheat? Do you have coolant? I worked on an '03 Civic SI once with a similar problem. Customer complained he had no heat, and the car ran rough. We worked out that he had a leaking headgasket, and that coolant was leaking into one of the cylinders causing a misfire. In such a case you might notice white exhaust smoke coming from the tail pipe. It might be worth a look.

If the blower itself isn't turning, check the fuse. Always a good place to start. The interior fuse box is located on the passenger side footwell, where your left foot would rest. You should see what looks like a fuse with a lightning bolt through it. There's also a box under the hood with the red + battery terminal sticking up through it. Good luck.
I already swapped out a couple fuses with no changes. No cylinder misfire but i will check the coolant to make sure everything is going to the right spots.
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post #5 of 12 (permalink) Old 11-13-2013, 04:17 AM
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Does your blower work?

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post #6 of 12 (permalink) Old 11-13-2013, 07:05 PM Thread Starter
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Does your blower work?
I turn it up to the highest but only a little amount of air comes from the vents, more air comes out of the vents near the windshield
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post #7 of 12 (permalink) Old 11-13-2013, 07:25 PM
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Have you checked your cabin air filter behind your glove box?

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post #8 of 12 (permalink) Old 11-13-2013, 07:45 PM
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You should be able to hear if your blower turns on. Just give a listen under your glove box.

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post #9 of 12 (permalink) Old 11-13-2013, 07:46 PM Thread Starter
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Have you checked your cabin air filter behind your glove box?
no i haven't, ill try to do that tomorrow, i can't remember if the previous owner had ever changed it, more than likely not and the car is at 100k
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post #10 of 12 (permalink) Old 11-13-2013, 07:49 PM
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That filter might be bricked lol. Hopefully it's a quick fix. Either way, we can walk you through the process of getting it working.

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