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Friedrich MR12C1H Flame Sensor
A flame sensor is one that will dependably sense the exact flame when the system starts. As you could guess, if the flame sensor is triggered the gas valve is shut off and the system halts until the problem is fixed.
Easy warnings your flame sensor should need replacing
- Your furnace is unwilling to even start when you have it set to
- The heating system will work sporadically when it feels like it
- LP or natural gas will not begin igniting and the control shows an error
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