OEM Carrier Gas Pressure Switch HK02LB008 for Model PG8JAA048070AGJA

This OEM Carrier pressure switch (part number HK02LB008) is the factory-specified replacement for the Carrier PG8JAA048070AGJA gas furnace. The pressure switch is a critical safety component that monitors negative pressure created by the draft inducer blower before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace enters a safety lockout — typically displaying a fault code and refusing to fire — even though the inducer motor itself may be running normally.

• OEM Part Numbers: Primary: HK02LB008 (Gas Pressure Switch) | Cross-references: HK06WC091 (Pressure Switch) and HK06WC100 (Pressure Switch w/ Bracket) — verify your unit's existing configuration before selecting
• OEM vs Generic: This is a genuine Carrier OEM switch, calibrated to the exact water column (W.C.) set point required by the PG8JAA048070AGJA. Aftermarket switches often carry wider tolerances that can cause nuisance trips or — worse — fail to catch a genuine inducer problem, creating a safety hazard.
• Install Difficulty: 3/5 — Requires shutting off gas and power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, manometer (recommended to verify W.C. after install). Always inspect the rubber hose port and tubing for cracks or blockages before condemning the switch.
• Warranty & Shipping: Backed by a 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JAA048070AGJA gas furnace. This part also cross-references HK06WC091 and HK06WC100 — if your existing switch includes a bracket, order HK06WC100 configuration. Confirm the W.C. rating stamped on your existing switch matches before installing. Have a question about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today and ship the same day.