Our criterion is about 7 years old. For the last few weeks, it will run the burners for a few minutes, run the blower to cool down, will repeat the cycle a few times and then goes into one hour lock out mode. We have had a technician out here who is stumped on what the issue is. We have replaced both the flame sensor and the circuit board. The technician checked the voltage on the pressue switch, the gas valve, and everything else. He says the gas valve is losing voltage. Any suggestions?

Clean the drain

My furnace goes into 1 hour lock