OEM Carrier Pressure Switch with Bracket HK06NB124 for Model PG9MAB060080AASA

This is the factory OEM replacement pressure switch with mounting bracket for the Carrier PG9MAB060080AASA gas furnace. The pressure switch is a critical safety device that monitors the negative pressure produced by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When the switch fails or its diaphragm weakens, the control board cannot verify that the inducer is operating correctly, resulting in a hard lockout, a flashing fault code, or a furnace that attempts ignition but shuts down immediately — leaving you with no heat.

• Specs: SPST (Single-Pole, Single-Throw) | Set point: -1.65" W.C. | 1.81" WC rated | Includes factory mounting bracket | Replaces obsolete part numbers HK06NB119, HK06NB120, HK06NB122
• OEM vs Generic: This is the genuine Carrier OEM part — factory-calibrated to the exact pressure set point required by your PG9MAB060080AASA furnace. Aftermarket pressure switches often carry ±10–15% tolerance on the set point, which can result in nuisance lockouts or, worse, failure to detect a true venting fault — a safety risk.
• Install difficulty: 2/5 — Shut off power and gas to the furnace before beginning. Disconnect the two low-voltage spade terminals (note: terminals are different sizes to prevent miswiring) and the rubber hose(s) from the switch ports. Photograph all connections before removal. Use a flathead screwdriver and needle-nose pliers. Tip: inspect hoses for cracks or blockages before installing the new switch.
• Warranty: 1-year OEM factory warranty. In-stock — ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PG9MAB060080AASA gas furnace. This part supersedes HK06NB119, HK06NB120, and HK06NB122, all of which are now obsolete. Verify your existing switch's W.C. rating on the data plate before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by — order now and we'll ship today.