OEM Carrier Gas Valve EF33CW189 for Model LC348TM402290

This is the OEM factory-specified combination gas valve (part number EF33CW189) for the Carrier LC348TM402290 furnace. The gas valve is the critical component that controls the flow of gas to the burner assembly. It opens in response to a 24V signal from the control board after the inducer, pressure switch, and igniter have all proven operation. When this valve fails, you'll typically experience a complete no-heat condition — the igniter may glow, but no flame appears, or the furnace enters a hard lockout after repeated failed ignition attempts.

• Specs: Combination gas valve | 24V coil voltage | Factory-matched inlet/outlet configuration | Integrated pressure regulation for consistent gas flow
• OEM vs Generic: OEM gas valves are calibrated to the exact pressure and flow specifications required by the Carrier LC348TM402290. Generic valves may have mismatched pressure ratings or coil sensitivity, risking improper combustion, nuisance lockouts, or unsafe operation — always use OEM on gas-carrying components.
• Install difficulty: 4/5 — Gas valve replacement involves shutting off the manual gas supply, disconnecting wiring harnesses, and performing a leak test after reinstallation. Tools needed: adjustable wrench, pipe thread sealant, multimeter, leak detection solution. This repair is recommended for licensed HVAC technicians or qualified gas line professionals only.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier LC348TM402290 furnace. Always verify the existing valve's part number, inlet/outlet sizing, and gas type (natural gas or LP) against your unit's data plate before ordering. If you need fitment verification, our parts specialists are available to confirm compatibility before you purchase.