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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
specifically models 207-210 and IN7-IN12
Precise Control: Facilitates tight differential pressure management for pump-on and burner-off setpoints
and early 53/55 series residential heaters
Maintenance-Free Design: No packing nuts to tighten or seats to replace
Carrier HK680016 Pressure Switch 321894-706 specifically models 207-210 and IN7-IN12The 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