The A.O. Smith 100262939 is an OEM natural gas control valve assembly used on A.O. Smith and compatible residential water heaters.
It is also commonly manufactured by Resideo (Honeywell WV8840 series platform) and functions as the main gas regulator + thermostat + safety control module for the water heater.
This valve controls:
Gas flow to the burner
Water temperature regulation
Pilot light ignition and monitoring
Safety shutoff (overheat, flame failure, sensor faults)
It is a critical safety component in gas-fired storage tank water heaters.
The A.O. Smith 100262939 is an OEM natural gas control valve assembly used on A.O. Smith and compatible residential water heaters.
It is also commonly manufactured by Resideo (Honeywell WV8840 series platform) and functions as the main gas regulator + thermostat + safety control module for the water heater.
This valve controls:
Gas flow to the burner
Water temperature regulation
Pilot light ignition and monitoring
Safety shutoff (overheat, flame failure, sensor faults)
It is a critical safety component in gas-fired storage tank water heaters.
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