OEM Carrier High-Fire Pressure Switch HK06WC091 for Model PG8JVB066135AAJA

This OEM Carrier pressure switch (part number HK06WC091) is the factory-specified draft-proving switch for the Carrier PG8JVB066135AAJA gas furnace. The pressure switch monitors the vacuum created by the induced-draft blower to confirm safe venting conditions before the control board allows ignition to proceed. When this switch fails, it breaks the proving circuit — causing the furnace to lock out before ignition, often with a flashing fault code indicating an open pressure switch. Common symptoms include a furnace that starts the inducer motor but never advances to ignition, or one that attempts ignition and immediately trips into hard lockout.

• Part Specs: SPST (Single-Pole, Single-Throw) | High-Fire rated | Factory Authorized Part manufactured by Honeywell for Carrier | Replaces superseded part; current OEM cross is HK06MC110
• OEM vs Generic: OEM pressure switches are calibrated to exact water-column (W.C.) trip points specified for your furnace's inducer and heat exchanger. Generic alternatives may use wider tolerances, risking nuisance trips or — more critically — failure to prove a venting fault, which creates a carbon monoxide hazard.
• Install Difficulty: 2/5 — Disconnect power and gas before starting. Tools needed: 1/4" nut driver, needle-nose pliers, and a short length of replacement hose if the original is cracked. Note the hose port orientation and wire terminal positions before disconnecting. Swap hose and spade terminals, restore power, and verify ignition sequence.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JVB066135AAJA gas furnace. Also fits many Carrier, Bryant, and Payne gas furnace applications sharing this high-fire pressure switch specification — verify your data plate and existing part number before ordering. Note: HK06WC091 has been superseded; this listing ships the current OEM replacement. Questions about fitment? Our HVAC parts team confirms compatibility before your order ships.