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Lennox XC14 Flame Sensor
A flame sensor is only used on furnaces that burn gas and is one that can reliably detect the acceptable flame upon ignition. As with any other safety sensor, when the flame sensor is activated the system remains completely shut down until obstacle is corrected.
Major indications your flame sensor will soon need to be replaced
- The heating system kicks in sporadically barely
- The gas entering the furnace refuses to burn and some type of error flashes on the main board
- The heating system is unwilling to produce any heat and will shut everything down
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