I have a Goodman gas heater. It is 6 years old. Never had any previous problems. This week when I turned on the thermostat, it blew only cold air. The unit uses a Gemini White Rodgers 36G54 gas valve.
I checked the gas line coming in to the valve and the gas is coming in strong. I called Pacific Gas & Electric and the technician came out and said there is gas to the valve. The pilot is lit. The problem, he said, is the valve is bad (not opening). I was surprised considering it is only 6 years old. However, I got a replacement valve (brand new, same kind) and installed it. The problem has not changed at all. Unit turns on and runs, just blows cold air. - There is gas to the valve. Okay, so I think the PGE tech was wrong and I just blew $80 replacing a valve that probably was operational. What should I check for next? Any help appreciated?