Rheem-Ruud PD425117 Relay

The Rheem-Ruud PD425117 Relay is a heavy-duty, field-proven DPST (Double Pole Single Throw) switching solution engineered for precise motor and sequence control. Operating on a 24VAC coil, this relay is the industry-standard direct replacement for 42-19423-02, ensuring seamless mechanical and electrical fitment in compatible Rheem, Ruud, and WeatherKing air handlers and furnaces. Featuring 1/4-inch quick-connect terminals, it is rated for up to 12 FLA at 120V and 8 FLA at 230V, providing the rugged durability required for high-cycle HVAC applications. This HVAC blower relay effectively isolates low-voltage thermostat signals from high-line voltage components, mitigating common failure points like sticking contacts or coil burnout. Whether you are performing a routine furnace relay replacement or troubleshooting a non-responsive blower motor, the PD425117 provides the reliability technicians demand to restore proper airflow and system sequencing without the need for mounting modifications.

Key Benefits

• Exact OEM Replacement: Direct substitute for Rheem 42-19423-02 and 42-21571-02, maintaining original equipment specifications.
• Versatile Electrical Ratings: Supports diverse HVAC fan relay applications with resistive ratings up to 18A at 277V and 50/60 Hz compatibility.
• Industrial Build Quality: Constructed with DPST silver-cadmium oxide contacts to resist welding and minimize electrical pitting during high-load switching.
• Fast Installation: Standard flange mount and 1/4" male spade terminals allow for rapid "plug-and-play" integration into existing control boards.

Common Questions

Can I use the PD425117 to replace a different relay brand?
As long as the 24VAC coil voltage and DPST contact configuration match your current part’s specs and physical footprint, this relay serves as a professional-grade alternative. Always verify full-load amperage (FLA) ratings before swapping.

What are the signs of a failing 24V HVAC relay?
Technicians typically look for a "clicking" sound without motor engagement, an indoor blower that won't shut off, or visual signs of overheating and arcing at the contact points. A multimeter test across the coil should show continuity if the part is functional.

Where is this relay typically located in the system?
In most Rheem and Ruud air handlers, you will find the PD425117 mounted inside the control cabinet, either directly on the blower housing or integrated near the transformer and control board.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.