OEM Carrier Pressure Switch w/ Bracket -1.65" WC for Model PG9MAA048060AEKA

This OEM pressure switch with mounting bracket (part# HK06NB124) is the factory-specified replacement for the Carrier PG9MAA048060AEKA gas furnace. The pressure switch proves that the induced draft blower has established proper airflow before allowing the ignition sequence to proceed. When it fails — or when the diaphragm stiffens or the hose cracks — the furnace control board detects an open switch circuit and locks out before any ignition attempt, often displaying a fault code. The result: no heat, a flashing LED error code, and a cold home.

• Specs: -1.65" W.C. (inches water column) set point | SPST (single-pole, single-throw) | Includes factory mounting bracket | Replaces obsolete part numbers HK06NB119, HK06NB120, and HK06NB122
• OEM vs Generic: This is the genuine Carrier OEM part, factory-calibrated to the exact -1.65" WC trip point required by the PG9MAA048060AEKA's inducer assembly. Aftermarket pressure switches often carry wider trip-point tolerances that can cause nuisance lockouts or, worse, allow marginal combustion airflow — both of which the OEM part is engineered to prevent.
• Install difficulty: 2/5 — A straightforward swap for anyone comfortable working inside a furnace cabinet. Tools needed: 1/4" nut driver, flat-head screwdriver, and a smartphone camera. Always photograph the existing hose routing and wiring before disconnecting anything. Power off and allow the inducer to cool before beginning. The included bracket simplifies direct bolt-in replacement.
• Warranty: 1-year OEM factory warranty. In-stock and ships the same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAA048060AEKA packaged gas furnace. This switch is also used across more than 200 Carrier and Bryant residential furnaces — always verify your existing switch's W.C. rating on the data label before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before your order ships.