Question about Goodman GDS80703ANA Open Flame Mid-Size Heater
Sometimes my gas good man furnace starts running then like after 20-30 seconds everything shuts down. I changed the flame sensor with a new one and I still have sometimes the same problem. After that I turn the power switch off then on. It starts working again. Is there any reason why this is happening? Anything I can do to fix it? The furnace is only 6 years old.
The two most common reasons I have found for this are listed below. You have already addressed the third one.
1) Grounding issue. This can be difficult to find but easy to diagnose. Try using a volt meter or even just a piece of wire. Touch one end to an unpainted surface of the interior furnace cabinet and the other end to the sheet metal plenum or other ground. If the symptoms go away then you have diagnosed the problem and need to find the faulty ground.
2) Pressure in the flu. Check to make sure that the flu vent pipe is not clogged or even partially filled with debris. The small rubber hose that connects to the switch from the inducer blower motor may be clogged. Also check the orifice on the inducer motor side. You can clear this with a paper clip. Water (condensation) in the inducer motor housing or pressure switch can cause a failure too. Rarely is the pressure switch itself bad. This usually will only happen if it has been physically damaged or soaked. Best of luck.
Posted on Jan 29, 2009
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Posted on Jan 02, 2017
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