Furnace Thermal Coupler

Honeywell home cq100a1039 u cq100a1039 replacement thermocouple for gas furnaces boilers and water heaters 30 inch 4 7 out of 5 stars 80 9 31 9.

Furnace thermal coupler.

If the pilot lights but won t stay lit the thermocouple is probably bad. If it accumulates soot it can give off a faulty reading and shut off the furnace. You can test it with a multimeter. Natural gas and propane burn cleaner than fuel oil and most gas furnaces present fewer operational difficulties than oil burners do.

Fortunately cleaning a thermocouple is a repair most handy homeowners can do themselves. If no flame is present the sensor stops or prevents the flow of gas from the gas valve thus preventing the dangerous situation of gas flowing into the appliance when there. In fact the problems that affect gas furnaces typically involve the furnace s thermocouple the pilot light or some component of the electrical system. The thermocouple is a safety device located by the pilot light on your furnace.

Most gas furnaces use either a flame sensor or a thermocouple often referred to as a thermal coupler both are safety devices that sense the presence of a flame and control the flow of gas to the appliance accordingly.