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Lennox G40DF-60D-135 Flame Sensor
The flame sensor is one of the safety features that will reliable sense the flame when the system starts. Because of the safety issues involved, if the flame sensor gets set off the furnace cannot start again for as long as it takes to remedy the problem.
Some clues your safety flame sensor needs replacing ASAP
- The unit runs occasionally when it wants to
- The propane or natural gas will not properly ignite and shuts off
- The gas furnace is unable to work when you have it set to
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