OEM Carrier LP Gas Pressure Switch 6.5" W.C. for Model PG8MAA036045AFJA

This OEM gas pressure switch is the factory-specified replacement for the Carrier PG8MAA036045AFJA packaged gas unit. The switch monitors gas supply pressure and opens or closes the control circuit when the setpoint is reached — acting as a critical safety interlock between the gas valve and the ignition sequence. A failed pressure switch typically causes a no-heat lockout, pre-ignition fault codes, or a furnace that starts briefly and shuts down before establishing flame. This listing covers three OEM part numbers for this assembly: HK02LB008 (Gas Pressure Switch), HK06WC091 (Pressure Switch), and HK06WC100 (Pressure Switch w/ Bracket) — all factory-matched for the PG8MAA036045AFJA.

• Specs: 6.5" W.C. cut-out pressure | LP / Propane gas rated | Compatible with air and natural gas applications | Horizontal or vertical mount | SPST switching action
• OEM vs Generic: OEM switches ship pre-calibrated to exact cut-out pressure. Aftermarket units often carry wide pressure tolerances, risking nuisance lockouts or — worse — allowing ignition at unsafe gas pressures. Always use OEM on gas-circuit components.
• Install difficulty: 2/5 — Shut off gas supply and disconnect power before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, manometer (to verify supply pressure post-install). Photograph all wiring connections before disconnecting. Note: HK06WC100 includes a pre-attached mounting bracket — no separate hardware required.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MAA036045AFJA packaged gas unit. Also fits select Bryant and Payne packaged units sharing this pressure switch specification. Verify your existing part number against HK02LB008, HK06WC091, or HK06WC100 before ordering. Not sure? Our fitment team confirms compatibility before you buy — no guesswork.