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New Gas valve receiving 24v wont open
Hi everyone, I have an ongoing problem that apparently local techs cannot figure out. My heater has a new gas valve and circuit board, its a goodman ol dependable. It has been igniting randomly for 2 weeks now. So far an additional new gas valve has been installed. A new regulator has been installed outside by the gas man and he pressure checked for any leaks, there are none. I have 7.4 in of pressure outside at the meter and inside at the heater. The gas valve opens when it is jumped directly from the board but not when hooked up normal. Directly from the board it is producing 27v and the voltage at the gas valve is 25-26.8v. Everything is working properly on the heater and the gas valve opens when jumped but not through normal wiring, even with same voltage. Yet another new gas valve was tested today and displayed same behavior, opens when jumped not thru normal wiring even though its receiving 24v at both locations. Heating sequence, blower, pressure switch, everything seems fine. Error code is 1 blink "failure to ignite". Please help house is cold driving me & techs nuts. Thanks in advance!!