Official Sentry gas water heater parts

Top reasons why your Sentry gas water heater won't heat water

• Pilot light not lit. Check to see if the pilot lot is on. Light the pilot if it's off.
• Check the gas supply. Make sure that the gas cut-off valve is fully open and that you have an adequate gas supply provided to the water heater.
• Bad thermocouple. If the pilot won't stay lit and the gas supply is okay, then a faulty thermocouple may be keeping the pilot from staying lit. Replace the thermocouple if it's bad.
• Failed gas valve assembly. A bad gas valve assembly won't allow any gas to flow to the pilot or the burner. Replace the gas valve assembly if it's bad.

Top replacement parts for Sentry gas water heaters

• Gas valve assembly. The gas valve assembly monitors tank water temperature and cycles the burner on and off to maintain set water temperature.
• Thermocouple. The thermocouple detects whether your pilot light is on by generating a very small electrical current powered by the heat of the pilot flame. If the gas valve assembly doesn't sense the small electrical current provided by the thermocouple, or the thermocouple cools, it assumes that the pilot light is off and shuts down the gas.
• Pilot igniter. The pilot igniter lights the pilot burner when the button is pushed.
• Temperature-pressure relief valve. The temperature-pressure (T&P) relief valve is a safety device that automatically opens to discharge hot water in the event of excessive temperature and/or pressure inside the tank. Replace the T&P valve if it leaks or malfunctions.