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Friedrich MW30C3F Limit Switch
The limit switch is a type of sensor switch located in the furnace that decides when the air is warmed to a point so that it may be pushed through the ducts and out the vents. A limit switch was crafted due to the fact that if the air inside the furnace is too cool the you will lose heat in the ducts and the vents will just blow cool air.
Important hints main limit switch is on its last leg
- The heating and AC system is unable to start nor will it stay running even though max temp has not been reached
- Your system is beginning to go through the startup sequence but stops quickly repeatedly
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