Rheem-Ruud 42-19736-86 Defrost Relay

The Rheem-Ruud 42-19736-86 Defrost Relay is a reliable DPDT (Double Pole Double Throw) switching component specifically engineered for heat pump applications and HVACR equipment. Operating with a 208/230VAC coil at 50/60Hz, this heavy-duty relay manages the critical transition between heating and cooling modes to initiate the defrost cycle. Its laminated magnet construction ensures high-efficiency performance and reduced vibration, while the untaped coil design promotes cooler operation during extended run times, preventing premature thermal failure in demanding outdoor environments.

Designed for seamless integration, the 42-19736-86 features molded terminal numbers and a clear circuit diagram on the housing to simplify field wiring and diagnostics. This HVAC replacement part is essential for preventing ice accumulation on the evaporator coil, ensuring the system maintains optimal heat transfer and efficiency. With a rating of 12 FLA at 120V and 6 FLA at 230V, it serves as a direct OEM replacement for various Rheem, Ruud, and Richmond units, and is plug-compatible with industry-standard alternatives like the Steveco 90-340 and Mars 90340.

• Enhanced Efficiency: Utilizes laminated magnet construction for superior electrical efficiency and more reliable contact engagement.
• Cooler Operation: The untaped coil design facilitates heat dissipation, extending the service life of the component under heavy cycling.
• Simplified Installation: Features molded terminal identification and an on-unit wiring diagram for fast, accurate service in the field.
• Universal Compatibility: Designed with a base that allows for easy replacement of competitive DPDT relays in refrigeration and air conditioning systems.

• What are the symptoms of a failing defrost relay? A faulty relay often results in the outdoor coil becoming completely encased in ice or the condenser fan failing to shut off during the defrost call.
• Can this relay be used in a 240V system? Yes, the 208/230VAC coil is rated for standard residential and commercial voltages, including 240V applications.
• Is this an OEM-equivalent part? This is a genuine Rheem-Ruud service part, ensuring exact physical and electrical matching with original equipment specifications.

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.