Carrier HK680016 Pressure Switch 321894-706 By replacing the legacy ignition

By replacing the legacy ignition replacement kit with this current OEM standard

Precise Control: Facilitates tight differential pressure management for pump-on and burner-off setpoints

and early 53/55 series residential heaters

The unit is constructed with a durable brass body and high-performance NBR seals

Carrier HK680016 Pressure Switch 321894-706 By replacing the legacy ignitionThe Carrier HK680016 High Pressure Switch is a critical safety component designed for precise refrigerant pressure monitoring in residential and commercial HVAC units. As the direct replacement for HK02AA359, this electronic switch prevents compressor damage by interrupting the control circuit when discharge pressures exceed safe operating limits. Maintaining a cut out range of 90 to 450 PSI, it ensures your system remains within the manufacturer's