Question about Heating & Cooling
I'm assuming that your talking about a Goodman gas furnace? If so, then four flashes on the board means a limit has been tripped. Two things you can do are, make sure that the return air is not blocked in any way and make sure your filters are clean, if not that, then there is a small hose that goes into a blower (usually up top) that has a small wheel that spins, and also goes to a limit switch that has two wires hooked to it. Try taking that hose off on the blower housing and stick a small wire into it to make sure it is not clogged (you won't be able to tell until you put it back together and turn it on). Also take the hose and **** and blow into it while it is still hooked to the limit switch. If you hear it clicking back and forth, then that switch is good. The other limit is screwed into the heat exchanger compartment and also has two wires that run to it. You can shut power off to the unit and check continuity between the terminals to make sure that it has a connection. Sometimes you can take it out and clean it a bit, then put it back in and it works, but no telling how long. I hope this helps some.
Posted on Feb 07, 2010
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Posted on Jan 02, 2017
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