I read the other posts with the same problem. I have a carrier 9200 which is getting error code 34. It's starting it's cycle but the flame goes out before the cycle is done heating. I've cleaned the flame sensor, and made sure the condensation p trap is clean and flowing. I was lost and called in a pro. He checked everything, but found that the gas valve pressure was only .7 when the furnace turned on. He brought that up to 3.5, since the book says it needs 3.2 to 3.8 to operate. But he was worried the valve may be going bad. Well, 3 days later, the same problem started again. Do you all think the valve needs replacement, or any other ideas. Thanks
Problems related to residential installations.
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