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International Comfort Products PGMD30G0906 Limit Switch
The limit switch is a switch in the heat exchanger that can determine when the air is warm enough for the main blower to kick in and circulate the air. The reason limit switches exist is due to the fact that if the air inside the furnace is too cool then the house will never get warm enough.
Major warnings of a barely functioning limit type switch
- The International Comfort Products system begins to run erratically repeatedly
- System will not initiate or will not stay running longer that five minutes
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