carrier 58PHA090

Old 01-22-22, 02:49 PM
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carrier 58PHA090

I have carrier 58PHA090, the furnace is not working properly. It ignites for a 1-2 minutes then it shuts down and also turns off the thermostat. This happened several times, every time I turn it on, it stays on a minute or so, then shuts down and the thermostat turns off. I thought it is thermostat issue, and replaced it, also I changed all filters, and also replaced the flame sensor still not working. After a day or two, I rechecked everything and now when the igniter is glowing but the gas valves is not even activating and I'm getting error code 34.

Any suggestions what this might be? Thanks
Old 01-22-22, 03:06 PM
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Welcome to the forums.

If you are losing the voltage to the thermostat it means there is a high limit safety switch opening.
Typically when one of these switches open.... the blower locks on too.

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