I have a Goodman GMS9 furnace. When the furnace starts the induction fan runs for about 15 seconds, the ignitor turns on but thats as far as it goes. The burners do not light and I don't think the gas valve turned on. I did find a loose condensate line (no clamp) on the heat exchanger. Also the induced draft blower is noisy and I suspect the bearings are starting to go. This is an intermittent problem and I would like to get it solved before colder temps set in.

SOURCE: Burner ignites and goes out (Goodman Gas-fired furnace)

Hi,
The problem you have is water in the exhaust pipe.
Check to see if the pipe has sagged anywhere or if there is a trap in the line.
If you hear gurgling then it is definetly water....
Some times can be hard to find, even a pipe 1/4 full will cause problems. They are very sensitive to flue problems.
Make sure that the flue pipe either runs back to the furnace or out to the outside, a continuos slope either way witha high spot in the middle.
Also check the bottom drain of the blower if it has one, have had them plug and trap water also..

I hope that this will help you to solve your problem!

Thanks for using Fixya!!

Heatman101

SOURCE: Goodman furnace model #GPO 125_4 REV 8 Installed 6/2/2002

Have you measured the temperature in the suppy plenum? Should be 140 to 160 max. If hotter, you have a blockage in the ductwork or vents closed. If within spec, bad circuit board.

SOURCE: Furnace start buts shuts off

It sounds like you have an obstruction in the exhaust vent. Thats why when you bybass the pressure switch it runs ok. Steve

SOURCE: Goodman GMP075-3 ignition problem

bad board,i have had several board failures on goodman

SOURCE: Main burners don't come on, though the ignitor goes bright

you should hear a click ,its the valve opening ? of check to see if the air fiter is clean ,