OEM Carrier LP Gas Pressure Switch 6.5" WC for Model PG8MAA042090AGJA

This OEM LP gas pressure switch (part number HK02LB008) is the factory-specified replacement for the Carrier PG8MAA042090AGJA packaged gas/electric unit. The pressure switch monitors gas supply pressure and opens or closes the control circuit when the detected pressure crosses its factory-set threshold. When this switch fails, the furnace or packaged unit will typically lock out on a pressure fault — refusing to initiate a heating cycle even though the inducer motor is running. This is the correct OEM part to restore reliable ignition sequencing.

• Specs: Cut-out pressure 6.5" W.C. | Suitable for LP gas applications | SPST normally-open contacts | Can be mounted horizontally or vertically | OEM part numbers: HK02LB008, HK06WC091, HK06WC100 (w/ bracket)
• OEM vs Generic: This is the genuine Carrier OEM switch, factory-calibrated to the exact 6.5" W.C. setpoint. Generic pressure switches often carry wider pressure tolerances, risking nuisance lockouts or unsafe operation. Note: HK02LB008 has been superseded — confirm your replacement part number with your unit's data plate.
• Install difficulty: 2/5 — Shut off gas and power before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, manometer (to verify inlet pressure). Photograph all tubing and wiring connections before removal. The HK06WC100 variant includes a mounting bracket if your application requires it.
• Warranty & Shipping: 1-year OEM factory warranty against defects. In stock — ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8MAA042090AGJA packaged gas/electric unit. This listing covers OEM part numbers HK02LB008 (gas pressure switch), HK06WC091 (pressure switch), and HK06WC100 (pressure switch with bracket). Always verify the part number and gas type (LP vs. natural gas) on your unit's data plate before ordering. Our team is available to verify fitment — contact us before you order.