OEM Carrier LP Gas Pressure Switch HK02LB008 / HK06WC091 for Model PG8JAA066135AEJA

This OEM Carrier LP gas pressure switch is the factory-specified replacement for the Carrier PG8JAA066135AEJA packaged gas furnace. The pressure switch proves that the draft inducer motor is operating and creating sufficient negative pressure before allowing the ignition sequence to proceed. When the switch fails or its diaphragm develops a leak, the control board cannot confirm safe venting conditions — resulting in a hard lockout before the burners ever fire. Common symptoms include the inducer spinning normally but the furnace refusing to advance to ignition, or a fault code indicating an open pressure switch circuit.

• OEM Part Numbers: Primary — HK02LB008 (Gas/LP Pressure Switch, 6.5" W.C. cut-out) | Secondary — HK06WC091 (SPST Pressure Switch, Honeywell Factory Authorized Part IS20027051N5065). Both numbers are valid for this application.
• OEM vs Generic: OEM pressure switches are factory-calibrated to exact water-column (W.C.) setpoints for your unit. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or, worse, allowing ignition under unsafe draft conditions.
• Install Difficulty: 2/5 — Shut off power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a manometer to verify W.C. setpoint post-install. Disconnect hose barb and two-wire spade connectors, swap switch, reconnect, and test through a full call-for-heat cycle.
• Warranty & Shipping: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8JAA066135AEJA packaged gas furnace. Also fits a broad range of Carrier, Bryant, and Payne furnace and packaged unit model series including PG8JAA, PG8JEA, PG8MAA, 58CTA, 58CVA, 58STA, and related variants. Always verify your unit's data plate W.C. rating before ordering — or contact our team for fitment confirmation before you buy.