Question about Goodman Heating & Cooling
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Posted on Jan 02, 2017
I have a goodman GMP075-3 that won't turn on. I think it is the pressure switch since I do not have a vent blockage. What is a venter and where can I find it??
Posted on Dec 30, 2008
your variable speed modulator on the fam motor it self has gone bad.
it can be easily removed and unpluged, and repaired by you
i believe goodmans are held on by 3 scres around the hub and a four wire connector back to the control
with out the exact modle of the fan i cannot help you find the modulator
but almost any HVAC supply store in your area will have it on the shelf....very common part
or they may need to order it
but its probably cheaper online somewhere
when you get the model of the var sp cntrl
type it in google
im sure it will pop up in a few hundred hits
Posted on Oct 25, 2009
Testimonial: "see my next post "
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
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