Heating, Air Conditioning, Fridge, HVAC/Furnace

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Question
I have a Payne furnace #PG8JAA/MAA.When I turn the thermostat on, I hear the click and the blower blows for about 90 seconds. Then the electronic igniter starts to turn but nothing happens. It spins for about 90 seconds. Theres a red light that flashes a code 12 first then a code 31

Answer
Hi Dave, The code 31 indicates the pressure switch is not closing. But your description tells me that's not correct. Does the igniter glow yellow? Make sure the gas valve inside the furnace is in the ON position. Do you smell any gas when it tries to start? If you have a voltmeter we can test the gas valve.

Heating, Air Conditioning, Fridge, HVAC

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Jim S.

Expertise

I can answer questions on gas or electric furnaces, ac units and heat pumps. I don't work on boilers,chillers,or home appliances.

Experience

I have been in the HVAC trade for over 35 years. For the past 15 years I have owned my own business. I am semi-retired so I can answer questions in a timely manner.

Education/Credentials
I attended trade school for 5 years on weekends and evenings. This was very hard to do, but well worth it!

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