What causes gas valve failure?

When They Fail The valve itself may have simply worn out or may be damaged due to basement seepage or submersion. Alternately, one of the electronic gas ignition components or a glitch in the safety circuit may be to blame. If your furnace has a standing pilot light, the thermocouple could be worn out.Click to see full answer. Besides, how much does it cost to replace a gas valve? Furnace Gas Valve Replacement Costs A furnace gas valve costs anywhere from $200 to $600 to replace. This part allows natural gas or propane to flow to your unit.Also Know, what does a gas valve look like? Houses with natural gas have a main shutoff valve (Fig. A) located just before the gas meter. This valve, often called the street-side valve, is normally a rectangular nub (Photo 1). When the long side of the nub or handle is parallel to the incoming gas line, it’s open and the gas is flowing. Hereof, can you repair a furnace gas valve? replacing a furnace gas valve doesn’t have to cost an arm and a leg in expensive repair bills. Repair a furnace gas valve with help from a plumbing, heating and cooling specialist in this free video clip.What does S mean on a gas valve? Definition of Furnace Gas Valve A furnace gas valve is a component of your furnace’s fuel system. The furnace gas valve opens and closes, which allows the flow of gas to the pilot light and burner(s). There are also gas valves located within gas-powered hot water systems or fireplaces.