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International Comfort Products PGMD60G0906 Limit Switch
The main reason limit switches are made 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. The limit switch has a sensor in the heat exchanger that decides if and when the air is actually warm enough for the main blower to kick in and circulate the air.
Warnings main limit switch has very little life left
- The International Comfort Products system starts to runs uneven on a regular basis
- The HVAC system will not even start or will not stay running even though max temp has not been reached
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