OEM Carrier Combination Gas Valve EF33CW201 for Model LC348TM401737

This is the OEM factory-specified combination gas valve (part number EF33CW201) for the Carrier LC348TM401737 furnace. The combination gas valve is the heart of your furnace's fuel delivery system — it regulates incoming gas pressure, controls the flow of gas to the burners, and responds to the 24V signal from the control board to open and close during each heating cycle. When this valve fails, the furnace will attempt ignition but produce no heat, or it may lock out entirely due to unproven flame. Common symptoms include a no-heat call with a working igniter, fault codes indicating gas valve failure, or a furnace that clicks and sparks but never fires.

• Specs: OEM combination gas valve | Part No. EF33CW201 | 24V coil actuation | Factory-calibrated inlet/outlet pressure settings | Direct drop-in replacement for Carrier LC348TM401737
• OEM vs Generic: This is a genuine OEM Carrier valve manufactured to exact factory pressure tolerances. Generic aftermarket valves may have inconsistent pressure regulation and coil response times, risking nuisance lockouts, unsafe operation, or voided equipment warranties.
• Install difficulty: 4/5 — Gas valve replacement involves shutting off the gas supply, relieving line pressure, disconnecting wiring harness connectors, and re-sealing threaded pipe fittings. Tools needed: adjustable wrench, pipe thread sealant (gas-rated), multimeter, and manometer for pressure verification. Professional installation strongly recommended. Always leak-test all fittings with approved gas leak detection solution after installation.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier LC348TM401737 furnace. Verify your existing valve's part number against EF33CW201 and confirm coil voltage on your unit's wiring diagram before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before every order — contact us and we'll confirm compatibility fast.