OEM Carrier Gas Pressure Switch (HK02LB008) for Model PG8MAA048135AGJA

This OEM Carrier gas pressure switch (part number HK02LB008, also cross-referenced as HK06WC091 and HK06WC100 with bracket) is the factory-specified replacement for the Carrier PG8MAA048135AGJA packaged gas furnace. The pressure switch proves that the inducer motor has created adequate negative pressure inside the heat exchanger before allowing the ignition sequence to proceed. When this switch fails, sticks open, or loses its calibration, the control board cannot confirm safe draft conditions — resulting in a no-heat lockout, blinking fault code, or a furnace that shuts down before the burners ever fire.

• Specs: LP / Gas Pressure Switch | Cut-out pressure: 6.5" W.C. (inches water column) | SPNO contact configuration | Factory-calibrated tolerance | Replaces HK02LB008, cross-ref HK06WC091, HK06WC100 (w/ bracket)
• OEM vs Generic: OEM pressure switches are calibrated at the factory to exact W.C. specifications. Aftermarket substitutes frequently carry wider tolerances, which can cause nuisance lockouts, unsafe draft conditions, or premature heat exchanger stress — risks not worth taking on a gas appliance.
• Install difficulty: 2/5 — Cut power and gas to the unit before beginning. Locate the pressure switch on the inducer assembly; disconnect the rubber hose and two wiring leads (photograph first). Swap the switch, re-seat the hose firmly to prevent air leaks, reconnect leads, and restore power. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, optional multimeter for continuity verification.
• Warranty & Shipping: 1-year OEM manufacturer warranty against defects. Orders placed before our same-day cutoff ship from our warehouse the same business day.

Compatibility: Engineered for the Carrier PG8MAA048135AGJA packaged gas furnace. OEM part numbers covered by this listing: HK02LB008 (Gas Pressure Switch), HK06WC091 (Pressure Switch), and HK06WC100 (Pressure Switch with Bracket). Note: HK02LB008 has been superseded — our stock reflects the current manufacturer-approved replacement. Verify your unit's data plate and existing switch W.C. rating before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy.