OEM Carrier Gas Valve EF33CW189 for Model LC348TM402289

This is the factory OEM combination gas valve (part number EF33CW189) designed as a direct replacement for the Carrier LC348TM402289 furnace. The gas valve is the central component responsible for regulating and delivering gas flow to the burner assembly. When it fails, the furnace will attempt ignition but produce no flame — resulting in a lockout condition, no heat, or repeated ignition cycle failures. A faulty gas valve may also cause intermittent heating, delayed ignition, or a complete loss of heat even when all other components test correctly.

• Specs: OEM combination gas valve | Part No. EF33CW189 | Factory-specified inlet/outlet pressure ratings | 24V coil operation | Integrated pressure regulation for safe, consistent gas delivery
• OEM vs Generic: This is a genuine OEM Carrier part, engineered to exact factory tolerances for the LC348TM402289. Aftermarket gas valves frequently suffer from inconsistent pressure calibration and coil voltage sensitivity, which can cause unsafe operation or premature failure — making OEM the strongly recommended choice for this safety-critical component.
• Install Difficulty: 3/5 — Gas valve replacement requires shutting off the gas supply, relieving line pressure, and carefully transferring all wiring connectors and gas line fittings. Tools needed: adjustable wrench, pipe thread sealant, flathead and Phillips screwdrivers, multimeter, and leak-detection solution. Always verify for gas leaks after installation. If you are not comfortable working with gas lines, consult a licensed HVAC technician.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: This gas valve is the OEM-specified replacement for the Carrier LC348TM402289 furnace. Confirm your existing valve's part number and gas type (natural gas or LP) on the unit's data plate before ordering. Need help verifying fitment? Our HVAC parts specialists will confirm compatibility before you buy — contact us today and get your system back up and running fast.