OEM Carrier Pressure Switch Assembly with Bracket HK06WC069 for Model PG8MAA042090ADJA

This is the genuine OEM pressure switch assembly with bracket (part number HK06WC069), the factory-specified replacement for the Carrier PG8MAA042090ADJA gas furnace. The pressure switch is a normally-open safety device that monitors negative pressure created by the draft inducer motor. Once the inducer reaches proper operating speed and generates sufficient negative pressure, the switch closes to allow the ignition sequence to proceed. When this switch fails or its hose develops a crack or blockage, the control board detects an open-circuit fault and locks out the furnace before ignition — resulting in a no-heat call with a flashing pressure switch error code.

• Specs: .27" W.C. break / .42" W.C. max make | Single-stage, normally open | Includes factory mounting bracket | Honeywell-manufactured (OEM cross: IS20205-4021)
• OEM vs Generic: This is the genuine Carrier OEM assembly with the pre-attached mounting bracket — ensuring exact fit and calibrated trip points. Aftermarket switches often deviate in W.C. rating, causing nuisance lockouts or, worse, unsafe bypass of inducer-proving protection.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, and a manometer (recommended to verify W.C. rating post-install). Always inspect the rubber hose from the inducer to the switch port for cracks, kinks, or condensate blockage before replacing the switch itself.
• Warranty: 1-year OEM factory warranty. In-stock — ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier PG8MAA042090ADJA gas furnace. Also fits select Bryant and Payne models sharing the same pressure switch specification — verify your unit's W.C. rating on the data plate or existing switch label before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.