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Lennox CB27UH-042 Furnace Door Switch
This switch blocks the blower and ignition sequence from starting in order to prevent injury and fire. You must have the device traded for new one ASAP especially if you think it is defective.
What are the signs that the safety switch on the furnace door is about to stop working?
- The door mechanism seems breaking off
- The HVAC system does not operate whether the door is off or on
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Before buying or purchasing do your best and make sure of the model number and also make a visual comparison so that you are positive that the right furnace door switch is the one being purchased. It can be quite simple to replace a furnace door switch on your Lennox CB27UH-042 so long as you know how to and have all the necessary tools to do the job right.
Feel free to download your manual for help.
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