Carrier HK06MB061 Pressure Switch

The Carrier HK06MB061 Pressure Switch is a critical safety component designed for precise furnace pressure switch replacement in high-efficiency Carrier, Bryant, and Payne condensing furnaces. This SPST (Single Pole Single Throw) inductive switch is factory-calibrated to a .18" WC (inches Water Column) set point, ensuring the inducer motor is moving sufficient combustion air before the ignition sequence begins. Built for rugged HVAC induction air monitoring, this diaphragm-actuated switch effectively prevents unsafe operation by detecting blockages in the flue or heat exchanger. As a genuine OEM HVAC replacement part, it ensures the internal safety circuit maintains the integrity of the furnace draft pressure monitoring system.

Key Benefits

• Exact OEM Calibration: The pre-set .18" WC activation threshold ensures factory-spec timing for the Carrier furnace safety circuit.
• Broad Compatibility: Serving as the HK06MB061 direct replacement, this unit replaces legacy part numbers HK06WC061 and 1206256 without modification.
• Industrial Build Quality: High-grade diaphragm material prevents premature hardening or cracking from constant thermal cycling within the burner cabinet.
• Contractor Grade Ports: Standard barb connectors accommodate factory silicone tubing for a secure, airtight vacuum seal.

Common Questions

What causes a .18" WC pressure switch to fail?
Failure is typically caused by moisture buildup in the sensing lines, a cracked diaphragm, or scorched contacts. Always verify the inducer motor is reaching full RPM and the venting is clear before replacing the switch.

Is this switch compatible with 1206256?
Yes, the HK06MB061 is the approved engineering update and direct substitute for the 1206256 and HK06WC061 models found in older mid-to-high efficiency units.

How do I test the Carrier HK06MB061?
Using a manometer and a multimeter, verify the switch closes continuity exactly at .18" WC of negative pressure. If the circuit stays open while the draft exceeds this set point, the internal diaphragm or switch contacts have failed.

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.