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International Comfort Products PGS048K120F Limit Switch
The limit switch is a switch in the heating area that senses, or governs, if and when the air is warm enough for the main blower to kick in and circulate the air. The main reason limit switches are made is 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.
What are some hints that my main limit switch is not working right?
- System will not initiate or will not stay running even though max temp has not been reached
- The HVAC system is beginning to go through the startup sequence but stops quickly frequently
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