My goodman furnace will not keep up in cold temperatures. Can I increase the amount of heat it puts out. Seems like air coming from vents is not that warm.

I have a Goodman GMP Series gas split unit furnace that I had installed approx 12 years ago. I have had no problems at all until this week and there is no heat. Someone at the gas company said that it may be the glow plug. It does not light up at all when the furnace kicks on. I have called several...

Hi, I'm trying to understand how I can fix a Goodman GMPN Condensing Gas Furnace. Problem: Heating Mode - I start the heating phase by selecting higher temperature on the thermostat to get the furnace in heater mode. There is a small fan that starts for about 30sec then everything just...

My Goodman furnace was working just fine the other day, but now I can hear it trying to start up but nothing happens. The cold air works just fine. It has no pilot light, works with internal ignition. I've done what the maunal suggests to check before calling someone out but nothing has changed....

I have a 5 year old 90% efficient Heil Furnace. I get no response when I call for heat. (the "blower only" setting works fine.) I have confirmed that it is not the thermostat and that the fan control board has power. The gas valve light pulsates to indicate that it is OK. The lead that goes to the...