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Heat Controller B-VMH09FC-1 Furnace Door Switch
The job of the furnace door switch inhibits initial fan and ignition sequence being triggered to start in order to prevent injury and fire. It is crucial to have this part traded for new one immediately if you can, especially if you think it is defective.
Major signs your furnace door switch will not last the year
- The HVAC system does not run whether the door is off or on
- The door mechanism looks as if it has been not there
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