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Old 03-12-2009, 09:04 PM   #1
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Gas Furnace loud during ignition


Hello,

We have a Coleman Evcon gas furnace that is pretty loud during ignition. It has a hot surface ignitor. As it lights, the sound of the gas igniting is a pretty loud whoosh, louder than it was a couple of years ago. Seems louder than makes sense. I have read that the burners may need to be cleaned. Can I just take the two tubes off the end and clean them, or should other things be cleaned?

Thanks...
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Old 03-12-2009, 09:08 PM   #2
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Gas Furnace loud during ignition


This is a picture of the furnace from my prior message.
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Last edited by biggles99; 03-12-2009 at 09:13 PM.
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Old 03-12-2009, 09:26 PM   #3
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Gas Furnace loud during ignition


You can remove them and clean the carbon buildup gently from the ends with a bristle brush/toothbrush. Then rinse them in hot running water/dry and reinstall them. There are small crossover slots which may need gentle cleaning also.
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Old 03-14-2009, 03:48 PM   #4
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Gas Furnace loud during ignition


Quote:
Originally Posted by yuri View Post
You can remove them and clean the carbon buildup gently from the ends with a bristle brush/toothbrush. Then rinse them in hot running water/dry and reinstall them. There are small crossover slots which may need gentle cleaning also.

Just remove the two funnel shaped pieces? Is there anything about the supply tube that I should also get with the toothbrush?
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Old 03-14-2009, 04:30 PM   #5
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Gas Furnace loud during ignition


No. Usually you can remove those hold down screws on the burner and slide them forward. BE CAREFULL not to hit and break the igniter.
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Old 11-12-2011, 06:37 AM   #6
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Gas Furnace loud during ignition


Update: I have tried this a few times, and it is still as loud as ever...not every time, but about 1/2 the time. When the gas ignites, it does with a rather loud whoosh as the gas ignites. Trying to think if it is something about the rectangular module that has the switch that looks like a small valve in it.

Had a furnace guy come out last year and he did not really do anything, other than adjusting that little lever a bit, which I think regulates the flow of gas.

I am thinking that somehow that whole thing needs to be replaced, if it is it, but not sure that is safe/possible to get someone to do?

Anyone ever replace that part of a furnace, outside of just replacing the whole furnace?
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Old 11-12-2011, 07:18 AM   #7
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Gas Furnace loud during ignition


Just a thought... maybe the ignitor is heating up a little slow or is a little weak? If so maybe the whoosh is caused by a little bit more gas getting out before ignition actually happens.

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