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Friedrich MR12Y3H Flame Sensor
The flame sensor is only found on gas furnaces. It is a sensor that will sense the acceptable flame upon ignition. As with other safety devices, if the flame sensor senses a problem everything stops until the problem is remedied and the system is reset.
Important hints your furnace flame sensor is going to die
- Your
system is unwilling to fire up when you crank the thermostat up - LP or natural gas has a tough time trying to burn and the control shows an error
- HVAC system starts on certain occasions when it wants to
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Before buying or purchasing any Friedrich MR12Y3H part, do your due diligence and make sure of the correct model as well as make a visual inspection in order to be sure the proper replacement flame sensor is the one being purchased. If you are unsure about the properly replacing the flame sensor by yourself then it would be in your best interest to consult a pro to do the work for you.
Feel free to download your manual for help.
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