Heil furnace model nulk075dg07 ignition problem
Posted: Fri Oct 30, 2015 11:24 pm
I have a issue going on with a furnace. When you turn the thermostat on the fresh air fan turns on like it should then the burner lights like it should after that is where I get the problem just before the fan kicks in or at the same time as it kicks in the flame suckes into the burner tube on one or all three burner tubes but may not do it in all three tubes at the same time and sometimes the flame returns to the burner and then the furnace works fine. I have had a heating guy out to look at it 2 years in a row and of coarse it didn't do it when he was here but " says he made adjustments and switched some wires around" which I know he didn't just charged me $200 each time. I'm tired of paying him for doing nothing. Tonight I took out the gas regulator and jet tube and pulled the jets out and blew them out but they were clean. I put it back together and nothing changed. Does anyone have anything i could try or know what's going on?