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International Comfort Products N9MP1125J20C1 Limit Switch
Limit switches exist because if the warmed air is too cool the you will lose all the heat as the air flows through the ducts. The limit switch is a type of sensor switch in the heat exchanger that can determine when the heated air is warm enough for the main blower to kick in and circulate the air.
Main clues critical limit switch has little life left
- The HVAC system will not begin the ignition sequence or will not stay running even though the desired temperature has not been attained
- The HVAC system starts to runs uneven often
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