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Carrier PTV Flame Sensor
The flame sensor is one that can reliably detect the flame while the system is starting. As you would probably could have guessed, if the flame sensor senses a problem the whole system stops for as long as it takes to remedy the problem.
Clues of a worsening Carrier flame sensor
- The gas supplying the furnace refuses to try to begin igniting and closes the gas valve
- Your gas furnace refuses to start at all
- The unit works sometimes at midnight, but only after the new moon following the fourth Monday of the month
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