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Fujitsu ASU36CLX Flame Sensor
A flame sensor is a safety feature that will sense the precise flame while the system is starting. As you could guess, if the sensor goes off the furnace cannot start again until that particular problem is fixed.
What warnings are present when my primary flame sensor is in need of replacing?
- The unit will kind of run rarely when it thinks it should
- The heat system refuses to ramp up and produces an error code on the circuit board
- The type of gas you use finds it impossible to begin igniting and closes the gas valve
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