Gas Furnace loud during ignition

biggles99 · 03-12-2009, 10:04 PM

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...

biggles99 · 03-12-2009, 10:08 PM

This is a picture of the furnace from my prior message.

yuri · 03-12-2009, 10:26 PM

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.

biggles99 · 03-14-2009, 04:48 PM

Quote:

Originally Posted by yuri

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?

yuri · 03-14-2009, 05:30 PM

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.

biggles99 · 11-12-2011, 07:37 AM

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?

raylo32 · 11-12-2011, 08:18 AM

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.