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The TRANE SWT04556 thermal switch is designed for various Trane HVAC units. It monitors the heat surrounding the burners, and if the inducer fan motor cannot draw enough air or the furnace is not venting properly, the switch will open to halt the ignition sequence and prevent the furnace from heating.
The SWT04556 thermal switch prevents furnace overheating by monitoring burner temperature and halting the ignition sequence when necessary.
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