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International Comfort Products PGS036S100F Limit Switch
The limit switch contains a sensor in the heating area that decides when the heated air is actually warm enough for the main blower to kick in and circulate the air. Limit switches are built 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.
Major warnings main limit switch will need replacing
- Your system begins to behave erratically from time to time
- The HVAC system will not start or run well even though max temp has not been reached
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