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International Comfort Products N9MPD075F12A2 Limit Switch
The limit switch is a switch in the heat exchanger that can determine when the heated air is warm enough for the blower to be activated. Limit switches exist due to the fact that if the air inside the furnace is too cool the you will lose all the heat as the air flows through the ducts.
Warnings limit type switch is in dire need of a replacement
- The HVAC system is unable to start nor will it stay running like it should
- The system is starting to behave erratically repeatedly
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