Rheem-Ruud 42-101443-89 .45″WC Pressure Switch

Description

Rheem-Ruud 42-101443-89 .45″ WC Pressure Switch

The Rheem-Ruud 42-101443-89 is a factory-specified pressure switch engineered for use in Rheem and Ruud heating systems. Set to a precise 0.45″ water column (WC) trip point, this switch monitors the negative pressure generated by the inducer motor to verify proper venting and combustion airflow before allowing the gas valve to open. It is a critical safety component that helps prevent unsafe furnace operation due to blocked flues, failed inducer motors, or restricted venting.

Key Features

• OEM Rheem-Ruud replacement pressure switch for reliable, drop-in fitment
• Factory-set trip point of 0.45″ WC for accurate pressure sensing
• Monitors inducer motor operation to confirm safe venting conditions
• Prevents gas valve activation if proper draft pressure is not established
• Helps protect against flue blockages, inducer failures, and venting restrictions
• Direct OEM replacement — no field calibration required

Application

Designed as a direct OEM replacement for compatible Rheem and Ruud gas furnaces and air handlers. Always verify compatibility with your specific model number before installation.

Why Choose an OEM Pressure Switch?

Using a genuine Rheem-Ruud pressure switch ensures the correct set point, connector configuration, and tubing port sizing for your unit. Aftermarket substitutes may not match the precise trip point, potentially causing nuisance lockouts or, worse, unsafe operation. Protect your system and your customers with the correct OEM part.