Question about Goodman GMS90703BXA Heater

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I have a 15 year old Goodman GMP075-3. The unit will not remain on more than 10 seconds. The igniter is new, the flame sensor has been cleaned with steel wool, I checked and re-seeded all wire connections for corrosion, the gas is igniting on all 3 burners. I still get one blink on circuit board and it still won't remain on more than 10 seconds.

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  • mhhockl Oct 26, 2009

    Had to get a whole new circuit board....everything was fine, except the parts and labor bill: $366.92!

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You may have a grounding problem. the furnace may not be grounded properly

Posted on Oct 31, 2009

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Since your getting ignition it sounds like it is shutting off due to airflow
you may want to drop the fan and check the coils above it
and the coils in the pelum with out proer air flow these units shut down at 180 degrees will cycle when cooled again
since your getting ignition your inducer seems to be fine

Posted on Oct 08, 2009

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Posted on Jan 02, 2017

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SOURCE: GMP075-3 looks good but shuts off after 10 seconds

I turn on the heat on the thermostat and the unit won't stay on. The gas would ignite but the flame would immediately go out. That will continue throughout the day. Sometimes it will heat up the house, but a majority of the time it don't.

Posted on Dec 07, 2009

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,Hello, Make sure the flame sensor is clean near the burners, The flame sensor is a metal rod that is on the opposite side of the ignitor. To clean the flame sensor you will need some steel wool, turn off power to the furnace and remove the flame sensor and clean it with the steel wool. After cleaning reinstall it and turn power back on to furnace.

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Sounds like a flame sensor issue. It may just need to be cleaned. It is located either far right or far left in the burner box and has only one wire going to it. It will be in the flame of the last burner. If the flame can't get to it in a very short time the computer shuts the burner down. Make sure all burners are clean. You can use a can of air if you are careful near the igniter, it is very delicate. Here are some other ideas.
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2 Answers

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