Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
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This OEM Carrier pressure switch is built to factory specification for the GB3AAV036055AAJA gas furnace. It is a critical safety device that verifies the draft inducer is moving combustion gases properly before allowing the igniter and gas valve to fire. When the switch reads the correct negative pressure, it closes and lets the heating sequence continue; if venting is blocked or weak, it stays open to prevent unsafe operation. A stuck, mis-calibrated, or failed pressure switch commonly causes ignition lockouts and pressure-switch fault codes. The genuine Carrier switch is set to the exact inches-of-water-column trip point your furnace needs—a detail universal switches frequently get wrong. Installation is easy, around 15–20 minutes: cut power, slip off the rubber hose, remove the mounting screws, transfer the wires, and reinstall. No calibration required. Genuine OEM parts help preserve your warranty and ensure safe, reliable cycling. In stock right now—order before 3PM CST for same-day shipping. Restore safe, dependable startups on your Carrier GB3AAV036055AAJA with the correct factory pressure switch.
This part is compatible with Carrier model GB3AAV036055AAJA.
Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.