Question about Goodman Heaters
I am looking for some kind of parts list or breakdown diagram of the parts for a goodman furnace model GMNT 060-3 ser #0108604061. Can anyone guide me in the right direction.
The sequence of events for furnace operation is -
Fan purge for 30-45 seconds. During this time, a pressure switch is actuated by the running of the purge fan, proving the control board the purge fan is running.
After purge and purge prove, the hot surface ignition and or spark begins. After a few second delay, the gas valve will open. The control board then monitors for flame prove through another sensor located near the burners. If there is no flame within 3-5 seconds, the gas valve closes. It will repeat this process, usually 3 times, before it shuts the system down, which requires a power down of the system to reset.
I have seen trash get into the hose between the purge blower and the purge switch. But you could be having other problems.
Posted on Dec 17, 2009
check grounding and make sure flame sensor is nt dirty .
Posted on Jan 24, 2010
Testimonial: "I cleaned the flame sensor, and that has seemed to do the trick! No problems since then. Thanks!"
Check the front of the unit and you should see 4 5/16 screws . I believe the outer 2 screws undo the top cover .Remove it first, and remove the inner 2 screws, and the lower door will come off. Good luck. Vern
Posted on Feb 21, 2010
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GMNT120-5 Service Instructions
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If you have questions please let me know, Sea Breeze
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