OEM Carrier Pressure Switch with Bracket 1.81" WC for Model PG9MAA060140AEKA — Part HK06NB124

This OEM pressure switch with mounting bracket is the factory-specified replacement for the Carrier PG9MAA060140AEKA gas furnace. The pressure switch is a safety device that proves the inducer motor is operating and creating adequate negative pressure before allowing the ignition sequence to proceed. When the diaphragm inside the switch fails or the switch loses calibration, the control board cannot confirm inducer operation and will lock out the furnace — resulting in a no-heat call with an error code typically indicating a pressure switch fault. Replacing with the correct OEM part restores precise setpoint accuracy and ensures code-compliant, safe operation.

• Specs: SPST (Single-Pole, Single-Throw) | 1.81" WC rating | 1/4" barbed port connections | Includes factory mounting bracket | Replaces obsolete part numbers HK06NB119, HK06NB120, HK06NB122, HK06NB123, and HK06ZB104
• OEM vs Generic: OEM Carrier pressure switches are manufactured to exact setpoint tolerances for the PG9MAA060140AEKA. Aftermarket switches frequently carry wider WC tolerances that can cause nuisance trips, repeated lockouts, or — critically — fail to protect the heat exchanger from negative-pressure stress.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Photograph all hose and wire connections before removal. Tools needed: 1/4" nut driver, needle-nose pliers, smartphone camera. Inspect all rubber hoses connected to the switch for cracks or blockage before condemning the switch itself.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse on in-stock orders.

Compatibility: Designed for the Carrier PG9MAA060140AEKA gas furnace. This part also fits over 200 Carrier and Bryant residential furnace models — verify your model number and existing switch part number before ordering. Our team is available to confirm fitment. Order now — in stock and ships today.