Wall Mount Gas Heater Keeps Shutting Off

I am sure the thermostat is out of whack but that really isn t the problem.

Wall mount gas heater keeps shutting off.

Yours may be different. We have a gas wall heater and we have been having episodes typically at night where the thermostat shows the temperature is below the desired temperature and the unit ignites turns on and runs for a couple minutes and then shuts off for about 30 45 seconds then turns on again runs for a couple minutes and then turns off again. If so replace the entire valve. This device is placed so that it senses.

This needs to be removed and blown out with compressed air. When the main burner shuts off either because of the thermostat s action or because of a cool thermocouple due to the sputtering pilot flame the heater may remain in the off condition depending on whether the pilot light happens to be extinguished when the burner cuts off. If you open and close the door at the bottom it will usually start up again. Even if we turn the thermostat all the way up the heater will fire up and shut off irregularly.

Gas wall heater turning on and off. If you re sure there is gas the pilot aperture may be blocked. Older model units have a device called the fan limit switch. We have a williams top vent gas fired wall furnace that won t run properly.

Troubleshooting a home gas heater. Inspect the thermocouple to determine if it is dirty or damaged in some way. As i said this is on my blue flame wall heater. The fan limit switch is actually two switches in one body the fan switch and a limit switch.

Then there is the piece where the flame for the heat comes up. The thermocouple is usually easily visible next to the pilot light. There is a vent hole in that nozzle on the side that gets clogged. If your gas water heater keeps shutting off the thermocouple could be dirty bent or damaged.

It should be parallel to the pipe. There could a fault in the gas valve s main burner solenoid causing it to draw excessive power and starving the pilot flame solenoid. Also there may be a pilot adjustment valve on your gas valve. If there is or your heater runs on natural gas check the handle on the gas line.