Reznor 89661 Timer Refrigerant or the control board throwing

or the control board throwing a flash code for "Pressure Switch Stuck Open

This orifice is specifically calibrated for Liquid Propane (LP) gas applications and should not be used for Natural Gas systems due to the specific flow requirements of higher-density propane

This OEM York furnace part is essential for maintaining design-specified CFM and system efficiency in high-duty cycle environments

or a ruptured diaphragm within the S1-024-25329-706 itself

Bi-Flow Capability: Engineered for seamless operation in both heating and cooling modes

Reznor 89661 Timer Refrigerant or the control board throwingThe 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