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Mitsubishi MSZ-09UN Flame Sensor
The flame sensor is a safety feature that can sense the acceptable flame upon ignition. Because of the safety issues involved, when the flame sensor gets triggered by something everything comes to a halt until the problem is fixed.
Signs to watch for in a bad safety flame sensor
- The whole system will start infrequently barely
- The gas will not burn and the control shows an error
- Your gas furnace is unwilling to start and completely shuts down
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