OEM Carrier Gas Pressure Switch HK02LB008 / HK06WC091 for Model PG8JAA042090AEJA

This is the factory-specified OEM gas (LP) pressure switch for the Carrier PG8JAA042090AEJA packaged gas unit, covering both OEM part numbers HK02LB008 (Gas Pressure Switch) and HK06WC091 (Pressure Switch). The pressure switch is a critical safety device that monitors the draft inducer's vacuum pressure to confirm the heat exchanger is properly vented before allowing ignition. When this switch fails — or its sensing hose collapses, cracks, or clogs — the control board cannot prove inducer operation, and the furnace will lock out before the ignition sequence begins, resulting in a no-heat call.

• Specs: Cutout pressure: 6.5" WC | SPST configuration | Suitable for natural gas and LP (propane) applications | Mounts horizontally or vertically | Factory-matched pressure setpoint for the PG8JAA042090AEJA
• OEM vs Generic: OEM pressure switches are calibrated to exact factory tolerances. Aftermarket switches can drift from their rated W.C. setpoint, causing nuisance lockouts in cold weather or — worse — allowing ignition before proper draft is confirmed. Always use OEM on gas-fired equipment.
• Install difficulty: 2/5 — Turn off power and gas before beginning. Tools needed: 1/4" nut driver, needle-nose pliers, and a short length of replacement hose (inspect the sensing hose every time). Photograph the existing hose routing before removal. Note: Always inspect and clear the inducer drain port and condensate trap before condemning the pressure switch.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PG8JAA042090AEJA packaged gas unit. This listing covers both OEM part numbers HK02LB008 and HK06WC091 — confirm your existing part number against your unit's wiring diagram or data plate label before ordering. Compatible across Carrier, Bryant, and Payne platforms sharing this pressure specification. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — call or chat now.