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International Comfort Products PA5530AKA2 Limit Switch
This is important due to the fact that if the air never warms up inside the exchanger then the house will never get warm enough. A normal limit switch has a sensor in the heating area that determines if and when the air is actually warm enough so that it may be pushed through the ducts and out the vents.
Red flags limit switch has to be replaced
- The heating and cooling system will not begin the ignition sequence or will not stay running longer that five minutes
- The whole system begins to run erratically often
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