Where Is The Flame Sensor On A Furnace
Olivia Luz
If you have a hot surface ignition system the hot surface ignitor can be fragile and easily break.
Full text article here. Be careful not to mistake the igniter for the flame sensor. Between the 1st and 2nd burner ports from left to right you can see the wire leading to the flame sensor the sensor is easily accessible and typically mounted by one 1 4 hex head screw. Typically the flame sensor comes in the form of a rod that can be found near the back of the furnace right in the path of the burner.
The job of the flame sensor is to quickly confirm that there is actually a flame present when the gas valve is open so natural gas isn t being dumped inside your home instead of being burned inside the furnace. It s not much more than a thin usually bent metallic rod that sits in front of the flame stream inside the furnace. The purpose of the flame sensor is to confirm to the system that whenever the gas valve is open a fire is actually present. There s not much to this component you ll see a thin rounded rod about the diameter of a coat hanger near your row of burners.
The flame sensor safeguards your furnace by ensuring that gas flows only when there is a flame to ignite it. In a gas furnace the flame sensor is a device that controls the valve emitting gas or propane into the furnace s combustion chamber. Where is the flame sensor on my intertherm model mgha 056abfc 05. A dirty flame sensor may cause your furnace to function improperly.
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Upon removing this screw the sensor will slide out so that you can easily clean it. If your furnace burners come on then go right off watch this. This is a video of a real flame sensor that is bad. There are different types of ignition systems in an electronic ignition gas furnace.
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