OEM Carrier High-Fire Pressure Switch HK06WC091 for Model PG8MEA024045AAJA

This OEM Carrier SPST high-fire pressure switch (part number HK06WC091) is the factory-specified replacement for the Carrier PG8MEA024045AAJA gas furnace. The pressure switch monitors the draft inducer motor to confirm it is operating at the correct RPM and generating adequate negative pressure before allowing the ignition sequence to proceed. When this switch fails, the furnace board reads an unsafe flue condition and locks out — typically before a single ignition attempt is ever made. Common symptoms include a no-heat call with a blinking fault code indicating an open pressure switch circuit, or a furnace that runs the inducer but never advances to ignition.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire rated | Factory Authorized Part manufactured by Honeywell for Carrier | OEM part number HK06WC091 (superseded by HK06MC110)
• OEM vs Generic: This is a genuine OEM part built to Carrier's exact switching pressure and tolerance specifications. Aftermarket pressure switches can have incorrect trip points, causing nuisance lockouts or — worse — failing to prove a true flue fault, creating a safety hazard.
• Install difficulty: 2/5 — Disconnect power and gas before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, and a manometer (recommended to verify W.C. setpoint). Note hose port orientation and wire terminal polarity before disconnecting. Replace inducer hose if cracked or brittle.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MEA024045AAJA 80% AFUE gas furnace. Also fits select Bryant and Payne models sharing this pressure switch specification — verify your unit's data plate and existing switch markings before ordering. Note: HK06WC091 has been superseded by OEM replacement part HK06MC110; both are fully interchangeable. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order.