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International Comfort Products NDC7075BFA3 Limit Switch
The limit switch contains a sensor in the air handler that determines if and when the air is warmed to a point for the blower to be activated. This is important because if the air never warms up then the house will never get warm enough.
Some warnings of a poorly working limit type switch
- The heating and AC system is unable to start or will not stay running for any length of time
- Your system begins to run inconsistently frequently
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