The Reznor 89661 Timer is a critical engineering component designed for high-performance HVACR control, specifically serving as a freeze stat bypass time delay relay. Engineered for heavy-duty unit heaters and rooftop units, this genuine Reznor OEM replacement part ensures system stability by temporarily overriding the freezestat during initial cold-weather startup. By managing the FRZSTAT bypass interval, it prevents nuisance shutdowns and short-cycling when entering a heating cycle in low ambient temperatures. This precision time delay relay is essential for protecting sensitive coils and internal components from thermal shock while maintaining uninterrupted airflow. Built to rigorous factory specifications, the Reznor 89661 provides contractors with a drop-in solution for maintaining sequence-of-operation integrity in commercial and industrial heating control systems. Its robust construction facilitates seamless integration with existing control boards and wiring harnesses, ensuring long-term field reliability in demanding environments. Key Benefits Ensures consistent unit operation by providing a precision timing delay to bypass the freeze stat during startup. Helps protect critical heat exchangers and coils from damage caused by frequent equipment cycling in cold climates. Maintains OEM system integrity and specification adherence for Reznor unit heaters and rooftop equipment. Reduces diagnostic time and service callbacks by stabilizing the freezestat control circuit. Common Questions Is the Reznor 89661 compatible with all unit heaters? This timer is specifically designed for Reznor HVAC equipment requiring a freeze stat bypass. You should verify your specific model number against the factory wiring diagram to ensure proper circuit integration. What symptom indicates a failing bypass timer? If your unit fires but immediately trips on a freezestat error during cold starts, the 89661 time delay relay may have failed to hold the bypass circuit, preventing the system from reaching steady-state heat. Can this be used for other time delay applications? While technically a relay, this part is optimized for FRZSTAT bypass sequences. Using it for general-purpose timing without verifying amperage and voltage ratings against the technical sheet is not recommended. 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.
