OEM Carrier Pressure Switch HK06WC061 for Model LC350LC400679

This is the OEM factory-specified pressure switch (part number HK06WC061) for the Carrier LC350LC400679 furnace. The pressure switch is a critical safety component that monitors the negative pressure created by the inducer draft motor before allowing the ignition sequence to proceed. When the switch fails or its diaphragm cracks, the furnace control board cannot confirm safe venting conditions — resulting in a no-heat lockout, a flashing fault code, or a system that attempts ignition and immediately shuts down without ever firing the burners.

• Specs: OEM part number HK06WC061 | Factory-calibrated W.C. (water column) rating | Single-port diaphragm-style switch | 24V control circuit compatible | Direct plug-in hose and terminal connections
• OEM vs Generic: OEM pressure switches are factory-calibrated to the exact W.C. rating required by the LC350LC400679. Generic replacements with slightly off-spec trip points can cause nuisance lockouts in cold weather or, worse, allow ignition under unsafe draft conditions — always choose OEM for safety-critical components.
• Install Difficulty: 2/5 — Power down and disconnect the furnace before beginning. Tools needed: flathead screwdriver, needle-nose pliers, multimeter (continuity test). Disconnect the rubber hose and two-wire harness, swap the switch, and confirm continuity closes when inducer is running. Label hose port orientation before removal.
• Warranty: 1-year OEM factory warranty against defects. In-stock units ship the same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model LC350LC400679. Always verify your existing switch's W.C. rating stamped on the body matches before installing. If you are unsure of fitment, our HVAC parts specialists can confirm compatibility before you order. Order today and your part ships same business day.