Carrier HK06WC077 Dual Pressure Switch, .22″ Low / .43″ High Fire Break

The Carrier HK06WC077 is an OEM dual pressure switch engineered for precise combustion safety control in Carrier furnaces and heating systems. By monitoring two distinct pressure thresholds, this switch ensures the inducer motor and combustion air system are operating correctly before allowing ignition to proceed — protecting both the equipment and the occupants it serves.

How It Works

This dual pressure switch monitors negative pressure generated by the draft inducer blower. The low fire break set point (.22″ W.C.) and high fire break set point (.43″ W.C.) allow the switch to verify proper airflow at both firing stages in two-stage or variable-capacity furnace applications. If adequate pressure is not established, the switch interrupts the ignition sequence, preventing unsafe or incomplete combustion.

Key Features

• Dual pressure switch in a single assembly — monitors two pressure set points
• Low fire break set point: .22″ W.C.
• High fire break set point: .43″ W.C.
• Designed for use in Carrier two-stage and variable-capacity furnace applications
• OEM replacement part — direct fit for compatible Carrier furnace models
• Helps protect against incomplete combustion and heat exchanger damage
• Supports proper draft inducer operation verification before ignition

Application

The HK06WC077 is a direct OEM replacement pressure switch for compatible Carrier furnace models. Always verify compatibility with your specific furnace model number before installation. Consult the equipment service manual for wiring and mounting instructions.

Specifications

• SKU: HK06WC077
• Brand: Carrier
• Type: Dual Pressure Switch
• Low Fire Break Set Point: .22″ W.C.
• High Fire Break Set Point: .43″ W.C.
• Application: Carrier furnace draft inducer pressure sensing