OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8JAA060155AAJA

This is the factory-specified OEM replacement pressure switch for the Carrier PG8JAA060155AAJA gas furnace. The pressure switch is a critical safety component that monitors the negative pressure (vacuum) generated by the draft inducer motor. Before allowing the ignition sequence to begin, it verifies the inducer is spinning at the correct RPM and that the flue pathway is clear. When this switch fails or sticks open, the furnace control board will lock out the system — typically before a single ignition attempt — leaving you with no heat.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire configuration | Factory Authorized Part manufactured by Honeywell | Designed to Carrier factory vacuum set-point specifications
• OEM vs Generic: This OEM switch is calibrated to the exact water-column (W.C.) set-point for the PG8JAA060155AAJA. Generic aftermarket switches frequently ship with incorrect W.C. ratings or wider tolerances, which can cause nuisance lockouts or — more dangerously — allow the furnace to operate with inadequate flue draft.
• Install difficulty: 2/5 — Power down the furnace and confirm zero voltage at the board before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, and a manometer or magnehelic gauge if verifying W.C. set-point. Note: HK06WC091 has been superseded by OEM replacement part HK06MC110 — both are cross-compatible for this application.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier PG8JAA060155AAJA gas furnace. Always cross-reference the W.C. rating printed on your existing switch's label and the model data plate before finalizing your order. Our HVAC parts specialists are available to verify fitment — order with confidence and get your heat back on today.