OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8JAA060090AAJA

This is the OEM-specified SPST high-fire pressure switch (part number HK06WC091) for the Carrier PG8JAA060090AAJA gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (vacuum) created by the draft inducer motor. Before the control board allows ignition, this switch must close — confirming that the inducer is operating at the correct RPM and that combustion gases will be safely vented. When the pressure switch fails or sticks open, the furnace locks out before ignition, producing a rapid-blink fault code on the control board and leaving you with no heat.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire rated | Factory-authorized Honeywell-manufactured switch | Negative pressure (W.C.) set point matched to PG8JAA060090AAJA inducer design
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. set points for your specific furnace model. Off-tolerance generic switches can fail to close under proper vacuum — causing nuisance lockouts — or close too easily, masking a genuine venting problem and creating a safety hazard.
• Install difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (recommended for verification). Photograph existing hose and wire connections before removal. Swap hoses and spade connector, then run a full call-for-heat cycle to confirm closure.
• Warranty & Stock Note: 1-year OEM warranty. Note: HK06WC091 has been superseded — the current shipping replacement is HK06MC110, a factory-authorized direct substitute with identical W.C. set points. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JAA060090AAJA gas furnace and fits across the Carrier, Bryant, and Payne furnace family sharing this inducer and pressure specification. Always verify your unit's existing switch W.C. rating against the data label before ordering. Our parts specialists confirm fitment before every order — contact us with your model and serial number for instant verification.