Carrier HK06MB011 Pressure Switch Assembly

The Carrier HK06MB011 Pressure Switch Assembly is a critical safety component designed for high-efficiency condensing furnaces. This multi-switch assembly features a three-switch configuration (3sw) engineered to monitor multiple vacuum and pressure set points, specifically -0.45 in. WC, -0.91 in. WC, and -1.79 in. WC. As a genuine OEM Carrier part, the HK06MB011 serves as the specialized direct replacement for legacy part number 334358-701. It ensures the inducer motor is pulling the correct draft through the heat exchanger before allowing the ignition sequence to proceed, preventing dangerous gas buildup or incomplete combustion.

For technicians troubleshooting a Carrier Error Code 31, this HVAC pressure switch assembly is the primary solution when diaphragms lose calibration or fail to close under specified negative pressure. Built to withstand the corrosive environment of high-efficiency combustion systems, the HK06MB011 provides precise sensing for both draft proving and flue monitoring. Integrating this factory-authorized assembly ensures HVAC system compatibility and restores original equipment performance standards without the risks associated with universal alternatives.

• Direct OEM Compatibility: Specifically engineered as the drop-in replacement for the 334358-701 and HK06NB015.
• Triple-Switch Monitoring: Monitors three distinct pressure thresholds to ensure safe multi-stage furnace operation.
• Safety Lockout Prevention: Accurately detects flue obstructions and inducer failure to prevent hazardous operation.
• Reliable Calibration: Factory-set trip points of -1.79, -0.45, and -0.91 in. WC for precise system synchronization.

• What does a flashing Code 31 mean on my Carrier furnace? This typically signifies a pressure switch fault, where the HK06MB011 fails to close or opens unexpectedly due to inadequate draft or a failing switch diaphragm.
• Can I use a single-port switch to replace the HK06MB011? No. This assembly utilizes three specific switches to manage complex safety checks in multi-stage systems; a single-stage switch will not provide the necessary feedback to the control board.
• How do I test if the 334358-701 is bad? Use a manometer to verify the inducer is pulling at or above the rated WC set points, then check for continuity across each switch terminal once the specific pressure is reached.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.