OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8JVA048090AAJA

This OEM SPST high-fire pressure switch is the factory-specified replacement for the Carrier PG8JVA048090AAJA gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (vacuum) created by the draft inducer motor before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace will attempt to start, fail to prove inducer operation, and lock out — leaving you with no heat. A failed pressure switch is one of the most common causes of furnace lockout codes on Carrier gas furnaces.

• Specs: SPST (Single-Pole Single-Throw) | 0.27" WC Break Set Point | 0.42" WC Max Break | Pilot Duty 28VA @ 24VAC | High-Fire rated | OEM Part # HK06WC091 | Includes pressure tube variant HK06WC092
• OEM vs Generic: This is a genuine Carrier OEM switch manufactured to exact factory set-point tolerances. Generic aftermarket switches often have imprecise WC ratings that can cause nuisance lockouts or — more dangerously — fail to detect an inducer fault, creating a flue gas safety risk.
• Install Difficulty: 2/5 — Straightforward replacement accessible from the furnace cabinet. Tools needed: Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Always shut off gas and power before servicing. Inspect the pressure tube for cracks or blockage before condemning the switch — a blocked or cracked hose is a common root cause of switch failure.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse in original Carrier packaging.

Compatibility: Designed for the Carrier PG8JVA048090AAJA gas furnace. Also fits many Carrier, Bryant, and Payne gas furnace models using the HK06WC091 specification. Cross-references Heil P/N 1183418. Note: HK06WC092 includes the pressure tube and is also available. Superseded by Carrier P/N HK06MC110 — contact us if you need help confirming the correct replacement. Order with confidence — our team verifies fitment before your order ships.