||01-25-2010 11:05 PM
goodman gmt ignition problem
I have a Goodman GMT (sorry don't have the exact model number that's going to require some spelunking into the crawlspace under the house) gas furnace that has been giving me issues for awhile now and I thought I ask those that know more than me, which isn't difficult :)
I've had this house for about three years, the unit was replaced 2 years before I bought it, so the unit is about 5 years old. The first year I moved in I had no problems with the heat at all, worked fine. The second year the heat would work fine 'today' but next week it wouldn't work at all. Several hours later it'd work fine again. This repeated scenario went on for about a month, and by then winter was over so I didn't worry about it
So far this year the heater has worked just like a champ with no issues until 2 days ago. The vent motor will fire up, it cycles through it's attempts to light, and it will shut down again. I turned it on a few hours ago to see what would happen, it lit up fine, starting moving heat. But I checked it a few mins after it had started working, and the air from the registers wasn't warm, the unit shut down about a minute later.
I went outside and cut power to the entire house to try to reset the unit, and it will try to startup but turns itself back off.
I can't understand why 'today' it works, and next tuesday it doesn't, then wednesday morning it's working fine again. Doesn't seem to make any sense to me.
Anyone have any thoughts on what I can check to see what's up?