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Fujitsu AOU12RL2 Flame Sensor
A flame sensor is only used on furnaces that burn gas and is one that will sense the precise flame in accordance with the initial ignition sequence. Because of the safety issues involved, if the sensor produces an error the whole HVAC system will remain stopped until that particular problem is fixed.
Elements of an unhealthy furnace flame sensor
- The propane or natural gas will not begin an ignition sequence no matter what
- The heating system is unwilling to start when you want it to
- HVAC system will run sporadically but only on the third Wednesday of on months beginning on Thursday
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