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International Comfort Products PHAD60N1K1 Limit Switch
The reason limit switches exist is because if the warmed air is too cool the you will lose heat in the ducts and the vents will just blow cool air. The limit switch has a sensor in the air handler that senses, or governs, if and when the air is actually warm enough that it can be circulated throughout the house.
Warnings limit type switch is going to die
- The HVAC system refuses to kick in nor will it stay running longer that five minutes
- Your system starts to erratically more than once
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