York Parts S1-33102957000 Heat Pump Defrost Control BoardHeat Pump Defrost Control Board for York Parts S1 33102957000 protects your heat pumps defrost cycle and helps maintain efficient operation during cold weather. This replacement control board is designed as a direct, plug in solution for heat pumps in the York YZB family and is compatible with multiple YZB specific part numbers, including YZB01811CA, YZB02411CA, YZB03011CA, and YZB03611CA. By precisely timing the defrost sequence, it prevents frost

120V operation for quick

this gasket minimizes downtime during furnace service

120–277V AC

With 1/4" X 1/4" connections and a robust 100

and 90-degree rotation for fast

With a 3/4 inch tank opening and a broad temperature range of 100 to 240 Deg F

Plug-In unit is used on the C554A Cadmium Sulfide Flame Detector

delivering steady comfort across seasons

standard wiring and wall-box compatibility

Compact footprint suited for tight panels

plug‑and‑play connections to compatible Fireye controllers

pilot diaphragm design for reliable control