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Friedrich C24YF Flame Sensor
A flame sensor is a safety feature that will sense the flame while the system is starting. As you could guess, when the flame sensor gets triggered by something everything stops until the problem is repaired.
Signals the primary flame sensor is going out
- The heat system is unwilling to fire up when you have it set to
- The furnace will sometimes work intermittently at the stroke of midnight after the second full moon following the second Sunday of the month
- The gas refuses to try to burn and the whole system shuts down
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