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Trane PTHD070 Flame Sensor
The flame sensor is only found on gas furnaces. It is a sensor that can sense the proper flame when the system starts. As with any other safety sensor, if the flame sensor senses a problem everything stops until the problem is repaired.
Key clues of a poorly working furnace flame sensor
- LP or natural gas finds it impossible to properly ignite under any circumstance
- The whole system operates infrequently when it feels like it
- Your gas furnace cannot even begin to start when you crank the thermostat up
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