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International Comfort Products NDN5075BFC2 Limit Switch
The limit switch has a sensor in the heat exchanger that can determine when the heated air is warmed to a point for the main blower to kick in and circulate the air. Limit switches exist because if the air never warms up then you will never get hot air through the ducts.
What happens when my main limit switch is almost dead?
- Your system starts to runs uneven on more than one occasion
- The heating and AC system refuses to start or continue to run for any significant length if time
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If you are going to be buying or ordering, do your due diligence and cross-check the model number and also make a visual comparison so that you are positive that the correct replacement limit switch is the one being purchased. HVAC professionals may have higher labor rates than others so you may want to ask around to acquire the best rate if money is a concern.
Feel free to download your manual for help.
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