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Fujitsu ASU30CLX Flame Sensor
The flame sensor is a safety device that will dependably sense the proper flame when igniting the system. As with other safety devices, if the flame sensor is triggered the system remains completely shut down until that particular problem is fixed.
Signs of an ineffective flame sensor
- The furnace is unable to ramp up and shows an error code on the board
- Any type of gas that has entered the furnace has problems trying to begin igniting and the board throws an error
- The entire heating system starts sometimes barely
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