OEM Carrier Gas Valve EF33CW201 for Model LC348TM402770

This is the factory-specified OEM combination gas valve (part number EF33CW201) for the Carrier LC348TM402770 furnace. The gas valve is the critical component that controls the flow of gas to the burners upon a call for heat. It opens in response to a 24V signal from the control board and closes immediately when heat demand is satisfied or a safety lockout occurs. Common failure symptoms include a furnace that attempts ignition but produces no heat, a system that locks out after repeated ignition tries with no flame established, or a unit that runs the inducer and igniter cycle but never fires — all pointing to a faulty or stuck-closed gas valve.

• Specs: OEM Part No. EF33CW201 | Combination gas valve | 24V coil activation | Factory-matched inlet/outlet pipe sizing and pressure settings for Carrier LC348TM402770
• OEM vs Generic: This is a genuine OEM Carrier gas valve — not an aftermarket substitute. OEM valves are pre-calibrated to exact manifold pressure specifications, eliminating the need for guesswork adjustment and reducing the risk of unsafe gas delivery that generic valves may introduce.
• Install difficulty: 4/5 — Gas valve replacement must be performed by a licensed HVAC technician or qualified professional. Required tools include pipe wrenches, gas leak detection solution, manifold pressure gauge, and a multimeter. Always shut off gas supply and disconnect power before beginning work. Leak-test all connections after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier LC348TM402770 furnace. Always verify your existing valve's part number on the data plate or valve body label before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required. Order today and your part ships same business day.