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Mitsubishi MUZ-FD09NA Flame Sensor
A flame sensor is a safety device that can reliably detect the proper flame during the initial ignition of the furnace. As you would probably could have guessed, if the flame sensor senses a problem the gas valve is shut off and the system halts until the main issue is remedied.
Main clues your safety flame sensor is in dire straights
- The heating system runs sporadically only after the second full moon of the month on a Tuesday
- The gas furnace refuses to even begin to start and spits out an error code on the main board
- The propane or natural gas will not start an ignition sequence and closes down
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