York S1-331-01975-001 Control Kit 30067439-890 the 903979 prevents common failure

the 903979 prevents common failure points like seized bearings or open windings that stall your heating cycle

As a direct replacement for A19BBA-1 and A19BAA-1

providing a comprehensive solution for field service and preventative maintenance

Zinc-dichromate plated steel construction ensures maximum durability against oxidation

if you are currently utilizing a V5197 or V5097 series valve requiring a 2

York S1-331-01975-001 Control Kit 30067439-890 the 903979 prevents common failureManaging frost accumulation on heat pump evaporator coils requires a reliable, logic driven solution rather than basic timed cycles. The York S1 331 01975 001 Demand Defrost Control Kit is a field proven OEM replacement board engineered to upgrade older, less efficient 031 01098 series controls. For contractors servicing York, Coleman, or Luxaire equipment, this heat pump defrost control utilizes a shunt jumper system to select precise defrost