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Lennox G40UH-48C-110 Limit Switch
One big reason why limit switches are designed that way is due to the fact that if the air never warms up inside the exchanger then you will never get hot air through the ducts. The limit switch is a type of sensor switch in the heating area that determines when the heated air is warmed to a point to activate the main blower.
Signals critical limit switch is dead
- The whole system begins to erratically occasionally
- The HVAC system refuses to start or run well like it ought to
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Before buying or purchasing, do your due diligence and cross-check the correct model as well as make a visual inspection in order to be sure the right limit switch is the one being purchased. You do not need to install the replacement part alone. Locate a pro locally to pay to install it for you.
Feel free to download your manual for help.
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