OEM Carrier SPST High-Fire Pressure Switch HK06WC091 for Model PG8MEA048070AAJA

This OEM pressure switch (part number HK06WC091) is the factory-specified high-fire draft proving switch for the Carrier PG8MEA048070AAJA gas furnace. The pressure switch monitors the negative pressure (vacuum) created by the inducer motor to confirm safe venting conditions before the gas valve is allowed to open. If the switch fails to close — or sticks open — the control board will lock out the ignition sequence entirely, leaving you with a cold house and a fault code pointing to a pressure switch failure.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire switching | Honeywell factory-manufactured | Negative pressure (W.C.) rated for Carrier PG8MEA series — verify rating on data plate
• OEM vs Generic: OEM pressure switches use factory-calibrated W.C. setpoints matched to your specific heat exchanger and inducer assembly. Off-spec generic switches can trip too early (nuisance lockouts) or too late (unsafe flue conditions).
• Install Difficulty: 2/5 — Turn off gas and power before starting. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer to verify vacuum post-install. Swap the hose barb tubing carefully to avoid kinks. Confirm fault code clears on first call for heat.
• Warranty & Shipping: 1-year OEM factory warranty against defects. In stock — ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MEA048070AAJA 80% AFUE gas furnace. Note: HK06WC091 has been updated by Carrier — current OEM direct replacement is HK06MC110. Both part numbers are fulfilled as the current superseding part. Always verify the W.C. rating on your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before your order ships.