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Old 01-25-2014, 04:06 PM   #1
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Gas Furnace won't turn on

I have carrier model 58STA/STX gas furnace. It's giving error code 34. I tried to clean buildup on flame sensor. It is trying to turn on, ignite glows to orange , but furnace doesn't start. Can you please help me troubleshoot?


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Old 01-25-2014, 04:43 PM   #2
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check if you have 24 volts across the 2 wires at the gas valve while the igniter is glowing. make sure your gas is ON to the house and any other gas appliances work. if the gas is on and you have 24 volts then the gas valve is bad ( or the burners are dirty and you need a Pro to check them and to find out if there is enough gas pressure) if no volts then the circuit board is bad. Removing and cleaning those particular burners and checking gas pressure etc is not DIY friendly or safe IMO.


"Cut it twice and it is still too short".

Last edited by yuri; 01-25-2014 at 04:47 PM.
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