General topics about all things heating, ventilation, air conditioning and refrigeration.
2 posts • Page 1 of 1
Am a hvac student working on a older 150 highboy gas furnace Burner goes out within 1 minute before blower comes on. Have changed limit on heater as well as one that has the dial on it, thermocoupler, fan relay,scratched my head , crossed my fingers and still same problem. Gas valve is all thats left that I'm aware of that it can be. Anyone with something else to try? Also I have 24 volts at gas valve before ,during and even once burner goes out.
do you have 24 vcoming out of the valve if so have you traced it back all the way back to make sure there is not a short somewhere. It's possible that you have a bad ground or loose wire if the valve is opening then the valve is probably good. There has to be a reason just keep digging.