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gas valve

heatandair Member Posts: 5
I had a call today for no heat The gas valve on a Goodman Furnace that was installed backwards it ran for almost a year. I reversed the valve and everthing is fine. My question is why did it run when it was backwards.


  • heatandair
    heatandair Member Posts: 5
    I don't do a lot of gas
  • Tim McElwain
    Tim McElwain Member Posts: 4,588
    What was the Make and model of the valve?
  • pecmsg
    pecmsg Member Posts: 3,888
    In backwards from the factory?
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 5,650
    edited November 2022
    If the pressure regulator section of the valve was not causing a problem, the solenoid portion would still open and close. I guess the regulator finally engaged and caused the flow restriction.

    I had a Firo-matic valve cause me hours of aggravation on a new oil burner installation. Went well into the night with operation for one cycle then no operation on the next. I blew out the fuel line and even changed out the fuel line with new copper tubing. Finally I reversed the Firo-matic and everything worked. Why did the oil flow on some cycles and not flow on other cycles? It was not a check valve but there must be a reason there is an arrow on that valve.

    Of course, I instaled the valve, so it had to be installed in the proper direction. NOT!
    Edward F Young. Retired HVAC ContractorSpecialized in Residential Oil Burner and Hydronics
  • HomerJSmith
    HomerJSmith Member Posts: 2,151
    Misteaks, happen!
  • Tim McElwain
    Tim McElwain Member Posts: 4,588
    Was it a single seated valve OR A REDUNDANT VALVE?