Furnace Gas Valve Shuts Off

Sometimes if the flame sensor is dirty it will fail to detect a flame.

Furnace gas valve shuts off.

If the flame sensor is dirty or has become corroded the flame won t. Ntrol board will shut off voltage to the gas valve to prevent the furnace from heating. If the flame sensor does not detect a flame the co. Now normally this is a good thing for you because if it didn t shut the gas valve your furnace could fill your home with gas.

If your furnace shuts off too often you could have a corroded or dirty flame sensor. Ultimately the thermocouple acts as a safety mechanism that prevents gas buildup within the home. 2006 irc g2420 1 2 prohibited locations says shut off valves are prohibited in concealed locations and g2420 5 says shut off valves have to be separate from the appliance. If it does not detect a flame it shuts the gas valve.

Without adequate heating of the thermocouple or thermopile the furnace gas valve closes. As a result this cuts off the supply of gas to the pilot light. My rheem home gas furnace gas valve chatters off and on is very noisy and wakes me up i replaced the thermostat answered by a verified hvac technician. If there isn t a flame the sensor will shut off the gas valve to keep the gas from getting into your house.

Well the flame sensor rod is a safety device designed to detect a flame in your furnace burners. Try cleaning the flame sensor with a fine abrasive pad. A gas shut off valve can be found in most modern gas appliances. If the furnace still doesn t heat replace the flame sensor.

They are designed to close the gas supply if the pilot light flame does not come on or if it is extinguished for some reason. If i shut off the power to the furnace and turn it back on it starts up and. That thermo switch opens if the furnace gets too hot and shuts down the gas. A 24 vac transformer or the thermopile powers the main valve.

You will occasionally have to replace the gas shut off valve or thermocouple as it is also called. A flame sensor lets your system know there s a flame when the gas valve is open. We use cookies to give you the best possible experience on our website. Also can the furnace be changed out without removing the valve or does the valve not fit through the knock out in the cabinet.