OEM Carrier Pressure Switch w/ Bracket HK06WC090 for Model GB1AAV036045AEJA

This OEM pressure switch with mounting bracket is the factory-specified replacement for the Carrier GB1AAV036045AEJA gas furnace. The pressure switch monitors negative pressure created by the induced draft blower to confirm proper venting before allowing the ignition sequence to proceed. When the switch fails or its hose becomes cracked or clogged, the furnace control board receives no proof signal and locks out the system — typically displaying a fault code for a failed pressure switch or stuck open/closed switch. The result: no heat, even when the inducer motor is running normally.

• Specs: OEM-rated water column (W.C.) pressure setting | Includes factory mounting bracket | Single-port hose connection | 24V control circuit compatible | Factory-matched trip point for GB1AAV036045AEJA inducer assembly
• OEM vs Generic: OEM pressure switches are calibrated to the exact W.C. rating required by Carrier's furnace design. Off-spec generic switches can trip too early or too late, causing nuisance lockouts or — more dangerously — allowing operation under improper draft conditions.
• Install difficulty: 2/5 — Power down and disconnect the furnace before beginning. Tools needed: Phillips screwdriver, 1/4" nut driver, needle-nose pliers. Inspect the rubber hose for cracks or moisture blockage before replacing the switch — a clogged hose is often the root cause of switch failure.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed specifically for the Carrier GB1AAV036045AEJA gas furnace. Always verify your existing switch's W.C. rating and hose port configuration against the data plate and wiring diagram inside your furnace cabinet before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.