OEM Carrier Pressure Switch with Bracket HK06NB124 for Model PG9MAB036080LBSA

This OEM pressure switch with integrated mounting bracket (part #HK06NB124) is the factory-specified replacement for the Carrier PG9MAB036080LBSA gas furnace. The pressure switch proves that the inducer motor has created adequate negative pressure in the flue system before allowing the ignition sequence to proceed. When this switch fails or its diaphragm becomes stiff or ruptured, the control board cannot confirm proper draft, and the furnace will lock out — typically displaying a pressure switch fault code — before the burners ever fire. If your Carrier furnace is shutting down before ignition with a draft or pressure fault code, this switch is the most common culprit.

• Specs: SPST (Single-Pole, Single-Throw) | Set Point: -1.65" W.C. | 1/4" barb port connection | Normally Open | Includes factory mounting bracket | Manufacturer: Honeywell for Carrier
• OEM vs Generic: This is a genuine OEM Carrier part built to exact factory W.C. tolerances. Off-brand switches frequently carry wider set-point tolerances, causing nuisance lockouts or — worse — allowing ignition under unsafe draft conditions.
• Install Difficulty: 2/5 — Disconnect power and gas before servicing. Locate the inducer assembly and photograph all hose and wiring connections before removal. Tools needed: flathead screwdriver, needle-nose pliers, 1/4" nut driver. Match hose ports carefully — one port may contain a flow restrictor orifice that must be transferred or matched on the new switch.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for Carrier model PG9MAB036080LBSA. This part supersedes obsolete part numbers HK06NB119, HK06NB120, and HK06NB122, and is used across more than 200 Carrier and Bryant residential furnace models. Always verify your unit's existing W.C. rating on the data plate or old switch before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — and we ship same day to get your heat back on fast.