At a loss on what should have been an easy problem
#1
01-07-20, 02:26 PM
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At a loss on what should have been an easy problem
Having issues with my furnace. It is an older Goodman GMP075-4 running on natural gas. The igniter will glow and flames will ignite, but it then immediately goes out. I have cleaned (then got a new) flame sensor, new high limit switch and new pressure switch but still the same problem. I can hear the click of the gas coming on and the induction fan is working fine. The board is not throwing any error blinks. New filter installed. I am at a loss, any help is appreciated. I did install a Ecobee thermostat around the end of November, but this issue just started at the end of December or so.
#2
01-07-20, 04:59 PM
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Location: Delaware, The First State
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Make sure the flame sensor is well into the flame.
Verify there is a good ground from the board to the funace & furnace to the home's electrical ground.
Just to eliminate the possibility of the thermostat, disconnect it & jumper or twist the red & white wires together.
Verify there is a good ground from the board to the funace & furnace to the home's electrical ground.
Just to eliminate the possibility of the thermostat, disconnect it & jumper or twist the red & white wires together.
#3
01-08-20, 10:01 AM
Member
What error do you get when the burner lights and then shuts off right away?
Check the mA of the flame rod with your meter.
And please stop replacing random parts. Diagnose first. Then replace only whats needed.
Check the mA of the flame rod with your meter.
And please stop replacing random parts. Diagnose first. Then replace only whats needed.
#4
01-08-20, 10:40 AM
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Why I am replacing ransom parts, is there is NO error code. Nothing electrical that is giving me any indication of anything wrong. Plus the parts are super cheap, I have literally spent less than $30 on the 3 parts replaced so far.
#5
01-08-20, 11:06 AM
Member
Then check grounds. And check the signal from the flame rod.
Also check to make sure your heating call isn’t dropping out right away.
This can also be a pressure switch problem with the switch opening and closing right away on ignition.
Also check to make sure your heating call isn’t dropping out right away.
This can also be a pressure switch problem with the switch opening and closing right away on ignition.
