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International Comfort Products T8MPL100F20A1 Limit Switch
The limit switch contains a sensor located in the furnace that senses, or governs, when the heated air is actually warm enough for the air to begin normal home circulation. Limit switches are crucial because if the air never warms up then you will never get hot air through the ducts.
Signals of a barely functioning main limit switch
- System will not begin the ignition sequence or will not stay running longer that five minutes
- The International Comfort Products system is beginning to runs spotty often
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