OEM Carrier Gas Valve EF33CW189 for Model LC350TM400559

This is the factory OEM combination gas valve (part number EF33CW189) for the Carrier LC350TM400559 furnace. The gas valve is the critical component that controls the flow of gas from the supply line to the burners. When it receives the 24V signal from the control board after successful ignition proving, it opens to allow gas flow and sustain the flame. A failed gas valve typically results in a no-heat condition — the inducer will run, the igniter will glow, but no flame will establish, sending the unit into lockout. You may also see fault codes indicating gas valve failure or repeated ignition attempts without ignition.

• Specs: OEM combination gas valve | Part No. EF33CW189 | 24V coil activation | Factory-calibrated inlet/outlet pressure | Direct drop-in replacement for Carrier LC350TM400559
• OEM vs Generic: This is a genuine OEM Carrier gas valve, ensuring factory-correct pressure regulation, coil sensitivity, and safety shutoff timing. Generic or aftermarket valves may not match the exact inlet/outlet pressure specs, risking improper combustion, nuisance lockouts, or unsafe operation.
• Install difficulty: 4/5 — Gas valve replacement must be performed by a licensed HVAC technician. Tools required: pipe wrenches, gas leak detector solution or electronic leak detector, manometer for gas pressure verification, and 24V meter for coil testing. Always shut off gas supply and disconnect power before beginning. Leak-test all fittings after installation.
• Warranty: 1-year OEM factory warranty on parts. In-stock and ships same business day from our warehouse.

Compatibility: This gas valve is the OEM-specified replacement for the Carrier LC350TM400559 furnace. Verify the existing part number on your valve's label before ordering to confirm fitment. If you are unsure, our HVAC parts specialists are available to verify compatibility before you purchase. Order today and receive same-day shipping on all in-stock OEM parts.