OEM Carrier Gas Pressure Switch Kit for Model PG8MAA036045AGJA

This OEM pressure switch kit contains all three factory-specified pressure switch components for the Carrier PG8MAA036045AGJA packaged gas furnace. The pressure switch is a critical safety device that proves the inducer motor is operating and creating adequate negative pressure before allowing the ignition sequence to proceed. When one of these switches fails — or its tubing collapses, clogs, or cracks — the control board interprets it as an unsafe condition and locks out the furnace, resulting in a no-heat call with a pressure switch fault code. Replacing the correct switch (or the full kit) restores normal operation quickly.

• Included OEM Part Numbers: HK02LB008 (Gas Pressure Switch) | HK06WC091 (Pressure Switch) | HK06WC100 (Pressure Switch w/ Bracket) — all three are factory-matched for the PG8MAA036045AGJA and cover all switch positions on the inducer assembly.
• OEM vs Generic: OEM Carrier pressure switches are calibrated to exact water-column (W.C.) trip points specified for this unit's heat exchanger and inducer combination. Generic switches frequently carry wider tolerances that can cause nuisance lockouts or, worse, allow the furnace to fire under marginally unsafe draft conditions.
• Install Difficulty: 3/5 — Shut off gas and 24V power before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, and a digital manometer to verify W.C. pressure after installation. Photograph all hose routing before disconnecting. HK06WC100 includes a bracket for direct inducer housing mounting.
• Warranty: 1-year OEM factory warranty on all three switches. Orders placed before 3 PM local time ship the same business day from our warehouse.

Compatibility: This kit is engineered specifically for the Carrier PG8MAA036045AGJA packaged gas unit. Always cross-reference the W.C. rating stamped on your existing switch and confirm part numbers against the unit's wiring diagram before ordering. Our fitment specialists are available to verify compatibility — contact us before you order if you have any questions.