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GMPN Multi-Positional Gas Furnace Dependable 92 (GMPN100-4)

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Starting furnace - Red LED...
GMPN Multi-Positional Gas Furnace Dependable 92 (GMPN100-4) Starting furnace - Red LED indicator steady - Inducer running great - Igniter turning on – NO FLAME … Inducer still running - After 3-4 repeat, furnace locks out!!! – Then Red LED indicator blinking slowly every second steadily forever … Any idea what is the problem? Heat exchanger ok – secondary heat exchanger ok, and cleaned.
Submitted: 2 years ago.Category: HVAC
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Answered in 3 minutes by:
1/21/2016
HVAC Technician: Matthew, HVAC Technician replied 2 years ago
Matthew
Matthew, HVAC Technician
Category: HVAC
Satisfied Customers: 2,014
Experience: 14 years experience in the HVAC field of service, installation, Manual J & D calculations
Verified

Do you have a multi meter?

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HVAC Technician: Matthew, HVAC Technician replied 2 years ago

Of your gas valve you have a purple wire and a blue wire. The purple wire runs through a series of roll out manual reset switches. Follow this purple wire from gas valve to each limit and press the small button in the middle of each switch to make sure none of them are tripped.

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HVAC Technician: Matthew, HVAC Technician replied 2 years ago

If none of them solve the problem then you would need a multi meter to test at gas valve and see if you are getting 24v about 10-20 seconds after igniter lights up. If no voltage then one of these limits is indeed tripped or you have a bad control board. If you are getting voltage then you either have no gas supply or your gas valve is bad and not opening.

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