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International Comfort Products GPCM36H100F Limit Switch
The limit switch contains a sensor located in the furnace that senses, or governs, if and when the air is warmed to a point for the main blower to kick in and circulate the air. The reason limit switches exist is because if the warmed air is too cool then you will never get hot air through the ducts.
What are the clues to watch out for to know my limit switch most likely is in need of replacing?
- The system begins to run inconsistently repeatedly
- System will not initiate or will not stay running for any significant length if time
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