Goodman Furnace

Old 10-17-18, 08:44 PM
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Goodman Furnace


I have a Goodman furnace which was professionally installed 2 years ago. I heard vibration noise while it was warming up (just prior to the fan kicking on) a few times tonight do I went downstairs to see if anything looked odd. I'm sure it's made a certain amount of noise in the past but this seemed a bit louder.. Might have been because the house was quiet.

Anyway...I was looking through the glass port and could see flames. After I had been watching for a few minutes the flames disappeared accompanied by the same sort of sound heard when a gas burner is turned off. I thought the cycle was done and the furnace was cooling down, but about 10 seconds later the flames came back. There was a bright orange color for a few seconds and then the normal sound of gas running / burning. This happened one more time before the furnace cycled off.

I waited a few minutes and turned the temp up a few degrees. While the furnace was heating the same thing happened once again but it still ended up turning on. I've since shut it off and am looking for advice. Is this a dangerous situation?

What kinds of things could be causing this? I did not smell any gas, I'm guessing the flame went out because the electronics stopped the gas flow?

I do remember having trouble last winter at the beginning of the season where the furnace would not create heat. A tech looked at it, opened the door to the heat exchanger area and was able to get it running. Had said an electronic component could possibly need replacing in the future.

I can run space heaters instead of the furnace if that's advised. Checked my CO meter and it had at some time read 20 ppm but this is just an alarm with a readout. It was currently at 0. 20 was in the memory. I've caught that number in the memory before and assumed it was due to lawn equipment running on the garage or something - the alarm itself hasn't sounded and I reset it an hour ago and it's still reading 0 ppm but I'll be keeping a closer eye on it.

Thanks for any advice

By the way the filter was changed at the beginning of the summer. Doesn't appear overly dirty to me but I'll try changing that tomorrow.

Last edited by Daved31415; 10-17-18 at 08:54 PM. Reason: Add info
Old 10-21-18, 04:24 PM
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When the burner shuts off, check the sight glass on the blower access panel for an error flash code, look it up and see what it means -> post back.

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