OEM Carrier Pressure Switch HK06WC091 for Model PG8MAA048070AAJA

This is the factory OEM pressure switch for the Carrier PG8MAA048070AAJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the inducer draft motor before allowing the ignition sequence to proceed. When the switch fails — or the diaphragm cracks — the furnace will lock out on a fault code, typically displaying a "stuck open" or "stuck closed" pressure switch error, preventing any heat from being delivered.

• Specs: OEM Part Number HK06WC091 | Factory-calibrated W.C. (water column) rating | Single-port diaphragm-type pressure switch | Direct drop-in replacement — no field calibration required
• OEM vs Generic: This is a genuine Carrier OEM part manufactured to exact W.C. trip-point tolerances. Aftermarket pressure switches frequently have ±10–15% W.C. variance, which can cause nuisance lockouts or — more dangerously — allow ignition under unsafe draft conditions.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: flathead screwdriver, needle-nose pliers, and a phone camera to document hose and wire routing. The switch mounts to the inducer housing bracket and connects via a single hose port and two spade terminals. Average tech time: 15–20 minutes.
• Warranty: 1-year OEM factory warranty against defects. Orders placed by 3 PM local time ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier PG8MAA048070AAJA 80% AFUE packaged gas furnace. Always verify your existing switch's W.C. rating stamped on the label before ordering to confirm this is the correct switch for your specific configuration. Our fitment specialists are available to verify compatibility before you order — no guesswork required.