OEM Carrier Pressure Switch w/ Bracket HK06WC090 for Model PG8UAA066111ADJA

This is the genuine OEM factory-replacement pressure switch with mounting bracket for the Carrier PG8UAA066111ADJA packaged gas furnace. The pressure switch is a critical safety device that proves the inducer (draft blower) has created sufficient negative pressure before allowing the ignition sequence to proceed. When the switch fails or sticks open, the furnace control board cannot verify a safe venting condition and will lock out — resulting in a no-heat call with no ignition attempt, often accompanied by a diagnostic fault code.

• Specs: -0.33" W.C. (inches water column) set point | Single-port design with factory-matched bracket | 24V control circuit | Direct OEM replacement for HK06WC090 — also supersedes HK06WC088, HK06WC086, HK06WC076, HK06WC073, HK06WC072, and HK660001
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory W.C. tolerances. Aftermarket pressure switches frequently carry ±10–15% W.C. variance, which can cause nuisance lockouts or — more dangerously — allow ignition under unsafe draft conditions.
• Install difficulty: 2/5 — Shut off gas and power before beginning. Tools needed: #2 Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Disconnect the rubber hose from the inducer port, unplug the two-wire harness, and swap the bracket-mounted switch as a single assembly. Always inspect the hose for cracks or blockages before reinstalling.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG8UAA066111ADJA packaged gas furnace. This switch also fits a wide range of Carrier, Bryant, and Payne PG8 and 58 series furnaces sharing the same inducer and W.C. rating — verify your unit's data plate and original part number before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your heat back on fast.