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Friedrich MW24C3F Limit Switch
A normal limit switch is a type of sensor switch located in the furnace that can determine if and when the air is actually warm enough to activate the main blower. The reason limit switches exist is because if the air is too cool inside the furnace to begin with, then the house will never get warm enough.
Major clues limit switch has little life left
- The HVAC system is beginning to run erratically from time to time
- The heating and cooling system will not begin or run well like it is supposed to
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