Engineered as the direct replacement for the legacy FM1D20A-120

Engineered for reliability as a critical safety component

It is a direct technical match for models listed as 0121589

For veteran technicians and mechanical contractors maintaining residential heating systems

Carrier HK02YB160 Pressure Switch 320788-703 Engineered as the direct replacementThe Carrier HK02YB160 Pressure Switch is a critical OEM safety and control component engineered for Carrier, Bryant, and Payne HVAC systems. As a specialized fan pressure switch, it monitors internal air pressure within the furnace or fan assembly to ensure safe and efficient operation. This switch is factory calibrated to a 260 PSI close and 160 PSI open specification, providing a reliable mechanical interface for cycling the fan motor based on