OEM Carrier High-Fire Pressure Switch HK06WC091 for Model PG8MEA048090AAJA

This OEM Carrier SPST high-fire pressure switch (part number HK06WC091) is the factory-specified replacement for the Carrier PG8MEA048090AAJA gas furnace. The pressure switch is a critical safety device that monitors the negative pressure (vacuum) created by the draft inducer motor. If the inducer fails to reach the correct RPM — or if there is a venting blockage, cracked hose, or diaphragm failure — the pressure switch will not close, preventing the furnace from proceeding to ignition. A faulty pressure switch typically causes the furnace to lock out before the ignition sequence begins, leaving the home without heat.

• Specs: SPST (Single-Pole, Single-Throw) | High-Fire configuration | Factory Authorized Part manufactured by Honeywell | Rated for Carrier 80% AFUE gas furnace applications
• OEM vs Generic: This is a genuine OEM Carrier part built to exact factory pressure set-points. Generic switches can be calibrated to incorrect water-column ratings, causing nuisance lockouts or — worse — allowing the furnace to operate with unsafe flue conditions.
• Install difficulty: 2/5 — Power down the furnace at the disconnect and thermostat before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers. Inspect the rubber hose port for cracks before installing the new switch. Swap the hose connection and 2-wire harness plug, then restore power and confirm the furnace cycles through all stages.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM.

Compatibility: Designed for the Carrier PG8MEA048090AAJA 80% AFUE gas furnace. Also fits many Carrier, Bryant, and Payne gas furnace platforms sharing the same inducer and venting configuration. Always verify the pressure switch set-point (W.C. rating) on your existing switch or unit data plate before ordering to confirm fitment. Have questions? Our HVAC parts specialists verify compatibility before you order — contact us today and get your part shipped fast.