OEM Carrier Pressure Switch with Bracket 1.81" WC for Model PG9MAB036080ABSA — HK06NB124

This is the factory OEM replacement pressure switch with mounting bracket for the Carrier PG9MAB036080ABSA gas furnace. The pressure switch monitors negative pressure created by the inducer blower to prove proper venting before the control board advances to the ignition sequence. When this switch fails or its diaphragm hardens and sticks, the furnace locks out — often displaying a Pressure Switch Fault or Error Code 31 — and no heat is produced. Replacing it with the correct OEM part restores reliable, factory-calibrated operation.

• Specs: 1.81" WC rating | SPST (Single-Pole, Single-Throw) | -1.65" WC set point | Includes factory mounting bracket | Supersedes HK06NB119, HK06NB120, HK06NB122
• OEM vs Generic: OEM pressure switches use precision-calibrated diaphragms matched to exact W.C. tolerances. Off-brand switches can trip too early or too late, causing nuisance lockouts or, worse, failing to detect a true venting fault — a potential safety risk.
• Install difficulty: 2/5 — Power down and confirm inducer is off before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, needle-nose pliers. Photograph hose routing before disconnecting. Note: ports may be labeled + and –; match flow restrictor/orifice port to the original switch orientation.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG9MAB036080ABSA gas furnace. This part is also the current superseding replacement for over 200 Carrier and Bryant residential furnaces. Always verify your unit's data plate and current pressure switch W.C. rating before ordering. Our team is available to confirm fitment — just reach out before you buy.