OEM Carrier SPST Pressure Switch High Fire for Model PG8JEA024045AAJA (HK06WC091)

This OEM Carrier pressure switch (part number HK06WC091) is the factory-specified draft-proving switch for the Carrier PG8JEA024045AAJA gas furnace. The pressure switch monitors inducer motor operation by detecting the vacuum created inside the flue passageway. When the inducer achieves the correct negative pressure (proving safe venting), the switch closes and signals the control board to proceed with ignition. If the switch fails — or if flue pressure is out of spec — it stays open, putting the furnace into a safety lockout before any gas is ever introduced. Common failure symptoms include: furnace locks out with no ignition attempt, the inducer motor runs but heating never starts, or an error code indicating an open pressure switch.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire configuration | Factory Authorized Part manufactured by Honeywell | OEM part number HK06WC091 (superseded by HK06MC110)
• OEM vs Generic: This is a genuine OEM Carrier pressure switch matched to the exact water-column (W.C.) rating of your PG8JEA024045AAJA. Aftermarket switches often carry wider W.C. tolerances that can allow unsafe inducer conditions to go undetected, risking combustion byproduct spillage.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, short length of replacement tubing (if hose is cracked). Photograph or label all hose ports and wiring connectors before disconnecting. Clear any blocked condensate or hose kinks before replacing the switch.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before our daily cutoff ship same business day from stock.

Compatibility: Engineered for the Carrier PG8JEA024045AAJA gas furnace. This part number has been superseded — we ship the current authorized replacement ensuring correct W.C. setpoint and connector fit. Verify your existing switch's W.C. rating on the data plate before ordering, or contact our team for fitment confirmation. In stock and ships today.