Rheem-Ruud 42-102056-08 Dual Pressure Switch -1.08"/-0.99" Gas Furnace OEM Replacement

The Rheem-Ruud 42-102056-08 is an OEM dual pressure switch assembly designed for use in Rheem, Ruud, Weather King, and Corsaire gas furnaces. This safety-critical component monitors draft inducer pressure to verify proper airflow conditions before allowing the furnace to ignite, protecting the system from unsafe operation.

Key Features:

• Dual pressure switch assembly — two switches in one unit for multi-stage pressure monitoring
• Pressure ratings: -1.08" W.C. and -0.99" W.C.
• Each switch features two wiring terminals and one hose port
• OEM genuine Rheem/Ruud part — direct factory replacement
• Compatible with Rheem, Ruud, Weather King, and Corsaire gas furnace models

Cross-Reference Part Numbers: 42-102056-08, 42-102057-07, 42-102063-02

This pressure switch is a protective device that opens and causes the HVAC system to stop operating if pressure conditions fall outside the safe operating range. Because pressure settings are precisely calibrated, always replace with the exact OEM-specified switch. Installation should be performed by a qualified HVAC technician.