Carrier HK02YB160 Pressure Switch 318518-761 the 78H40 (identical to Lennox

the 78H40 (identical to Lennox 78H4001) regulates refrigerant flow into the evaporator coil by sensing heat load changes

Using this coil on lower voltage circuits will result in insufficient magnetic force to lift the plunger

ensuring maximum CFM delivery and silent operation

it is compatible with fluorinated refrigerants (HCFC and non-flammable HFC) and uses 1/4-inch flare connections for secure integration

Durable Construction: High-grade laminations and encapsulated windings resist vibration and heat-cycling

Carrier HK02YB160 Pressure Switch 318518-761 the 78H40 (identical to LennoxThe 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