OEM Carrier Pressure Switch with Bracket for Model GB1AAV048135AEJA — Part# HK06WC090

This OEM pressure switch (part number HK06WC090) is the factory-specified replacement for the Carrier GB1AAV048135AEJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting conditions before allowing the ignition sequence to proceed. When it fails or sticks open, the furnace will lock out prior to ignition — often displaying a fault code — leaving you with no heat. The included bracket ensures a direct, vibration-free OEM-fit installation with no modifications required.

• Specs: Factory-calibrated water column (W.C.) rating | Includes OEM mounting bracket | Single-port design | 24V control circuit compatible | Direct factory replacement for part# HK06WC090
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. rating required by the GB1AAV048135AEJA heat exchanger and inducer assembly. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or, worse, unsafe operation.
• Install difficulty: 2/5 — Power down the furnace at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a multimeter to confirm continuity. Photograph all hose and wire connections before removing the old switch. Inspect the pressure port hose for cracks or blockages while the switch is off.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed specifically for the Carrier GB1AAV048135AEJA gas furnace. Always verify the W.C. rating stamped on your existing pressure switch and cross-reference part number HK06WC090 before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy. Order today and get your furnace back online fast with same-day shipping.