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The RUUD pd425155 is an OEM pressure switch kit designed for use in gas furnace applications. The pressure switch monitors negative pressure created by the inducer motor during furnace operation, proving that the venting system is functioning before allowing ignition to proceed. This is a safety-critical component that prevents furnace operation under unsafe venting conditions. Licensed HVAC technicians install this part during routine service calls or when diagnosing ignition lockout, furnace short-cycling, or draft-proving faults.
This pressure switch kit is suited for residential gas furnace systems where the original pressure switch has failed, is out of calibration, or has been damaged. It ships as a kit, which may include the switch and associated hardware needed for installation. Technicians replacing a failed pressure switch should verify the setpoint and hose port configuration against the existing switch before installation. This part is an exact OEM replacement sourced directly from the manufacturer.
Designed as an OEM-style replacement pressure switch kit for RUUD residential gas furnace systems. Confirm application against the original equipment part number before ordering.
Installation should be performed by a licensed HVAC technician. Shut off power to the furnace at the disconnect switch and allow the system to cool before beginning service. Verify that the replacement switch setpoint matches the original and that all pressure hose connections are secure and free of cracks before restoring power. Reference IFGC guidelines and local mechanical codes for applicable service requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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