OEM Carrier Gas Pressure Switch (HK02LB008 / HK06WC091 / HK06WC100) for Model PG8JAA036110AGJA

This OEM Carrier pressure switch is the factory-specified replacement for the Carrier PG8JAA036110AGJA packaged gas/electric unit. The pressure switch proves that the inducer motor has established adequate draft before allowing the control board to proceed with ignition. When it fails — or the hose, port, or diaphragm is compromised — the furnace will lock out during the pre-purge cycle, leaving you with no heat and typically a diagnostic fault code indicating a pressure switch failure.

• Specs: Cut-out set point: 6.5" WC (inches of water column) | SPST configuration | Suitable for air, natural gas, or LP gas applications | Mounts horizontally or vertically
• OEM Part Numbers Covered: HK02LB008 (Gas Pressure Switch) | HK06WC091 (Pressure Switch) | HK06WC100 (Pressure Switch w/ Bracket) — all are factory OEM Carrier components for this platform. Note: HK02LB008 has been superseded; direct replacement is HK02MB008.
• OEM vs Generic: OEM pressure switches are calibrated to exact W.C. setpoints from the factory. Off-brand switches frequently carry ±15% tolerances that cause nuisance lockouts or, worse, allow ignition under unsafe draft conditions. Don't compromise on safety-critical components.
• Install Difficulty: 2/5 — Disconnect power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer (recommended for setpoint verification). Photograph hose routing before disconnecting. Always inspect the rubber sensing hose and port for cracks or blockages before condemning the switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PG8JAA036110AGJA packaged gas/electric unit. Also fits select Bryant and Payne models sharing this pressure switch platform — verify the W.C. rating on your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility before you buy.