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EdgeStar AP12000S Air Pressure Switch
The function of the pressure switch is to sense if the blower is on and running. This switch is one of the critical mechanisms designed to keep you from harm. Some particular air pressure switches can have a manual reset, from which the switch will have to be manually reset in order for the system to begin normal operations again.
Signs to Look for when the Switch is Beginning to Go Bad
- The expected temperature in the house is almost never fully achieved.
- Incorrect voltage range running through the pressure switch.
- Furnace refuses run.
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