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Lennox CB27UH-042 Limit Switch
The limit switch is a type of sensor switch in the heat exchanger that makes the determination if and when the air is warm enough for the main blower to kick in and circulate the air. The reason limit switches exist is because if the air is too cool inside the furnace to begin with, the you will lose all the heat as the air flows through the ducts.
Major symptoms limit type switch will not last the year
- Your system starts to shut down unexpectedly more than once
- Your Lennox system will not begin or run well like it is supposed to
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If you are going to be buying or ordering a replacement limit switch for your Lennox CB27UH-042 do your best and cross-check the model number and also make a visual inspection so that you are positive that the correct limit switch is being ordered. You do not need to install it yourself. Consult with a professional locally to replace the part.
Feel free to download your manual for help.
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