Description
Rheem-Ruud 42-101443-91 Pressure Switch Overview
The Rheem-Ruud 42-101443-91 is an OEM replacement pressure switch engineered for reliable draft and combustion air proving in Rheem and Ruud heating systems. With a precisely calibrated set point of 0.60″ water column (w.c.), this switch monitors inducer operation and helps safeguard the heat exchanger by confirming proper venting conditions before allowing ignition to proceed.
Key Features
- Set point: 0.60″ w.c. (water column) for accurate pressure sensing
- Switch type: SPST (Single Pole, Single Throw) for straightforward circuit control
- Connection: 1/4″ barb fitting for secure hose attachment
- Direct OEM replacement for compatible Rheem and Ruud furnace models
- Designed to verify proper inducer/draft blower operation before ignition
- Helps protect the heat exchanger and ensure safe furnace operation
How It Works
The pressure switch senses negative pressure created by the draft inducer blower. When the inducer establishes sufficient airflow — confirmed at the 0.60″ w.c. threshold — the SPST switch closes, signaling the control board to proceed with the ignition sequence. If adequate pressure is not detected, the switch remains open and lockout is triggered, preventing unsafe operation.
Application
- Replacement pressure switch for Rheem and Ruud gas furnaces
- Compatible with systems requiring a 0.60″ w.c. SPST pressure switch
- Always verify compatibility with your specific model number before installation
Installation Notes
Install by connecting the 1/4″ barb port to the appropriate hose from the inducer housing or collector box. Ensure all hose connections are secure and free of cracks or blockages. Consult the furnace service manual and follow all applicable safety codes during installation.
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