Question about Goodman GMS90703BXA Heater
On this model 3 flashes means that the pressure switch is open. Verify that there is no blockage in the flu pipes, check for obstructions in the pressure switch tube(s) and orifices. Make sure the wires are all securely attached and that the inducer motor is running too. If all checks out ok then it may be the switch itself. In rare situations this error can be related to gas pressure at the manifold.
Posted on Jan 06, 2011
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Posted on Jan 02, 2017
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