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Lennox 13ACD-030 Flame Sensor
A flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that will sense the proper flame when the system starts. As with most safety features, when the flame sensor gets triggered by something everything comes to a halt until that particular problem is fixed.
Major warnings your flame sensor is on its last leg
- The furnace will kind of run sporadically when it feels like it
- The type of gas you use will not begin igniting and closes the gas valve
- Your furnace will not produce any heat when you have it set to
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