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Friedrich MW36C3G Flame Sensor
The flame sensor can only be found on furnaces that burn a gas. It is a safety sensor that will dependably sense the acceptable flame during ignition. As with most safety features, if the flame sensor gets set off everything stops until the problem is remedied and the system is reset.
Hints the primary flame sensor will have to be replaced
- The furnace will run intermittently when the time is right
- The gas refuses to ignite under any circumstance
- Your heating system is unable to begin operations when you crank the thermostat up
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