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Gas not turned on to water heater. Gas valve on water heater not set to pilot setting. Faulty gas valve. Igniter for lighting pilot not working.
Step 1) Stut off your water heater gas valve. Step 2) Drain the heater. Step 3) Disconnect is the gas flex hose. Step 4) Remove the gas valve from the tank. Step 5) Fix a new valve and reverse all the steps.
Same as any hot water heater. Turn the gas valve to off.
gas valve and pilot assebley cost more
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THERMOCOUPLE or defective gas valve
engine
Usually gas appliances come with an extra valve in with the instructions. Just replace the valve. You may have to ask a heating specialist how to find the connection on your gas line. But it is not too difficult.
The thermocouple proves to the system that the pilot light is lit and the gas valve can safely open.
It does not have a heater control valve.It does not have a heater control valve.
If it is gas operated, the hot water heater may not light because it may have a defective millivolt sensor. The millivolt sensor is heated up by the pilot and generates a fractional amount of voltage telling the gas valve that the pilot is lit and the gas valve can now be safely opened to heat the water heater.
It does not have a water flow valve in the heater plumbing.It does not have a water flow valve in the heater plumbing.