OEM Carrier Pressure Switch with Bracket for Model GB1AAV048111AFJA — Part# HK06WC090

This OEM pressure switch (part# HK06WC090) is the factory-specified replacement for the Carrier GB1AAV048111AFJA gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting conditions before allowing ignition to proceed. When it fails or sticks open, the furnace control board will lock out the ignition sequence entirely — leaving you with a furnace that runs the inducer but never attempts to light. Common symptoms include a flashing fault code indicating pressure switch failure, a furnace that cycles the inducer repeatedly without igniting, or a unit that simply won't produce heat despite normal thermostat signals.

• Specs: Factory W.C. (water column) rating matched to GB1AAV048111AFJA | Includes OEM mounting bracket | Single-port hose connection | 24V control circuit compatible
• OEM vs Generic: This is a genuine OEM Carrier part. Generic pressure switches often carry wider W.C. tolerances that can allow unsafe ignition conditions or cause nuisance lockouts. The factory-rated switch ensures your furnace operates within designed safety parameters every cycle.
• Install difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: 1/4" nut driver, flathead screwdriver, and a manometer if diagnosing W.C. before replacement. Inspect the hose port and tubing for cracks or blockages before installing the new switch. Photograph all hose and wire connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed for the Carrier GB1AAV048111AFJA gas furnace. Always verify the W.C. rating printed on your existing switch and cross-reference part number HK06WC090 on your unit's data plate or wiring diagram before ordering. Our team is available to confirm fitment — just reach out before you buy. In stock and ready to ship today.