OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8JVB048070AAJA

This factory-authorized OEM pressure switch (part number HK06WC091) is the direct-fit replacement for the Carrier PG8JVB048070AAJA gas furnace. Manufactured by Honeywell to Carrier's exact specifications, this SPST (Single-Pole, Single-Throw) high-fire pressure switch monitors the negative pressure (vacuum) generated by the draft inducer motor, proving that the inducer is running at the correct speed before allowing ignition to proceed. When this switch fails or sticks open, the control board cannot confirm safe venting conditions and will lock out the furnace — resulting in a no-heat call with the inducer running but no ignition attempt. A faulty pressure switch is one of the most common causes of furnace lockout codes, especially in colder months when the stakes are highest.

• Part Type: SPST Pressure Switch — High Fire | Factory-Authorized Honeywell OEM Part | Replaces HK06WC091 (superseded by HK06MC110)
• OEM vs Generic: This is a genuine Carrier/Honeywell factory part, precision-calibrated to the exact water-column (W.C.) trip point required by the PG8JVB048070AAJA. Aftermarket switches often carry wider pressure tolerances, risking nuisance lockouts or — worse — failing to detect true inducer faults.
• Install Difficulty: 2/5 — Straightforward swap on most gas furnaces. Tools needed: 1/4" nut driver or 5/16" nut driver, needle-nose pliers, and a manometer or magnehelic gauge for verification. Always power down and confirm 24V is off before disconnecting. Photograph hose and wire routing before removal.
• Warranty & Shipping: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JVB048070AAJA gas furnace. This part has been superseded — current production ships as HK06MC110, which is the authorized direct replacement. Always verify the water-column rating on your existing switch's label before ordering to ensure correct high-fire calibration. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — reach out before placing your order.