OEM Carrier Pressure Switch HK06WC061 for Model LC350TM400621

This OEM pressure switch (part number HK06WC061) is the factory-specified replacement for the Carrier LC350TM400621 furnace. The pressure switch is a safety device that monitors negative pressure created by the inducer draft motor before allowing the ignition sequence to proceed. When the switch fails or becomes stuck open, the furnace control board interprets this as an unsafe venting condition and locks out the heating cycle — leaving you with a blinking fault code and no heat. Common symptoms include a furnace that starts the inducer motor but never advances to ignition, or a system that throws a pressure switch fault code on the control board.

• Specs: OEM part number HK06WC061 | Factory-calibrated W.C. (water column) rating | Single-port pressure switch | Designed for Carrier LC350TM400621 furnace venting configuration
• OEM vs Generic: This is a genuine OEM Carrier pressure switch, calibrated to the exact water column rating required by your furnace. Aftermarket substitutes often carry imprecise W.C. ratings that can cause nuisance lockouts or, worse, allow unsafe venting conditions to go undetected.
• Install difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: flathead screwdriver, needle-nose pliers, and a multimeter to confirm continuity after installation. Always inspect and clear the pressure switch hose of moisture or debris before installing the new switch.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier LC350TM400621 furnace. Always cross-reference the W.C. rating printed on your existing switch and match it to this part number before installing. If you have any questions about fitment, our HVAC parts specialists are available to verify compatibility before you order. In stock and ready to ship today — get your heat back on fast.