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International Comfort Products HAC024AKA1 Limit Switch
The limit switch contains a sensor located in the furnace that can determine if and when the air is actually warm enough so that it may be pushed through the ducts and out the vents. One big reason why limit switches are designed that way is due to the fact that if the air inside the furnace is too cool then you will never get hot air through the ducts.
Hints of a deteriorating critical limit switch
- The system begins to act differently on more than one occasion
- The HVAC system will not begin or run well longer that five minutes
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