York S1-029-25428-000 Detector 318423-701 also identified as RLY2038 and

also identified as RLY2038 and RLY2038K

Genuine OEM Precision: Guaranteed fit for specific Goodman and Amana models without the need for modification

The enclosed fan relay design protects internal components from dust and debris

The 25-35 mV range ensures the electromagnetic coil in the gas valve remains energized

Simplified Installation: Comes with a 30-inch vapor-filled capillary and standard quick-connects for rapid field replacement

York S1-029-25428-000 Detector 318423-701 also identified as RLY2038 andThe York S1 029 25428 000 is an OEM duct smoke detector engineered for precise integration into light commercial and residential HVAC systems. Designed with a 4 wire photoelectric sensor head, this unit utilizes low flow technology to maintain reliable performance across air velocities ranging from 100 to 4,000 feet per minute (FPM). It serves as a direct HVAC replacement part for existing safety infrastructures, featuring a dedicated harness control