OEM Carrier Gas Pressure Switch HK02LB008 for Model PG8JAA036045AEJA

This OEM gas pressure switch is the factory-specified replacement for the Carrier PG8JAA036045AEJA packaged gas unit. The pressure switch is a safety device that monitors the negative pressure (draft) created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace will lock out before ignition — often displaying a fault code and leaving the home without heat.

• Specs: OEM Part Numbers: HK02LB008 (primary) / HK06WC091 (cross-reference) | Single-port pressure switch | Factory-calibrated W.C. (water column) rating | 24V control circuit compatible
• OEM vs Generic: OEM pressure switches are calibrated to the exact water-column rating specified by Carrier engineering. Generic substitutes frequently drift out of tolerance, causing nuisance lockouts or — worse — failing to detect a true venting fault, which is a safety risk.
• Install difficulty: 2/5 — Power down the unit at the disconnect before beginning. Tools needed: 1/4" nut driver, flat-head screwdriver, manometer (recommended for verification). Disconnect the rubber hose and wiring harness, swap the switch, and confirm the hose port is clear of blockages before reassembling.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model PG8JAA036045AEJA packaged gas heating units. Always verify the W.C. rating stamped on your existing switch against this part before installation. If you are unsure of fitment, our team verifies compatibility before you order — no guesswork required.