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International Comfort Products GPFM48S120F Limit Switch
One big reason why limit switches are designed that way is due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts. A normal limit switch is a type of sensor switch in the heating area that senses, or governs, when the air is warmed to a point for the blower to be activated.
Subtle hints main limit switch needs replacing ASAP
- Your International Comfort Products system will not start or run well longer than 10 minutes
- The whole system is beginning to go through the startup sequence but stops quickly more than once
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