General topics about all things heating, ventilation, air conditioning and refrigeration.
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I'm having issues with my furnace. It's an American Standard model number TUE080A936K2 and serial number P022W942G. It gave me some trouble (would not ignite) about a year ago. I disconnected and reconnected the wires/plugs and it worked fine. I'm having the same trouble again and tried the same solution. It worked, but only temporarily. I noticed the igniter would come on and light the burners, but then it would go out after a minute or two. There is a code showing (4 flashes) indicating open high limit device. I replaced both high limit switches on my furnace and I'm still having troubles. Does anyone have any advice?
Thanks for the quick reply. The filter is practically brand new (I replaced it less than a month ago). I cleaned the flame sensor (it was a little dirty), but that didn't do the trick. The igniter itself is not getting hot or glowing. I used to be able to disconnect it and reconnect then it would ignite and the burners would ignite. Right now, I can't even get it to ignite. I will say, the last time I had the igniter working, it ignited the burners then the burners went out within a minute or two.