Repeat these steps with the new gas valve.
Honeywell water heater gas control valve reset.
The honeywell valve uses a thermopile instead of a thermocouple as did previous designs.
Turn the gas control dial to off and let sit for one minute.
Locate the hot surface igniter and look for a spark or glow there.
Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly.
Slide the ribbon of wires out of the clip on the housing and the front of the gas valve is free.
The wt8840 series is the water heater control for trade use to replace wv8840 valves used in aosmith and bradford white water heaters.
I checked that ao smith gas water heater in the laundry room right away.
After resetting it several times and bypassing the thermal switch i noticed.
Assuming you don t have a power vented unit a 7 flash means the gas control valve has failed and needs to be replaced.
Basics honeywell gas control valve thermostat.
Heat on the thermopile generates.
8 reset gas valve this will only appear after the gas valve has been shutoff and continues to produce a current to the thermopile.
The water heater s gas valve is located near the bottom of the unit and connects to your home s natural gas line.
Turn the water heater s gas valve switch to the off position wait for a few seconds and then flip the switch to the on position to reset the system.
If your water heater does not begin working or another lock out condition occurs have a competent hot water heating specialist diagnose the system and make repairs.
The water heater comes with a sophisticated advanced honeywell water heater thermostat valve that provides continuous monitoring of the water temperature and turning on and off the gas accordingly all without battery.
Set the thermostat or the device s controller slightly above the current room temperature.
Water heaters covered by this handbook are equipped with honeywell gas control valve thermostats.
Keep track of which front is which.
If the pilot remains lit you will need to replace the gas control valve.
Had to fix a water heater that had the honeywell 5 blinks of death error code.
If you have a power vented unit a 7 flash is a flammable vapor sensor error.
You may have to replace the sensor but first you can try a reset by turning the unit off at the switch on the gas valve wait a minute then turn the switch back on.
Reverse the above steps to mount the new front onto the old back that s still hooked to the water heater.
