OEM Carrier Two-Stage Gas Valve 24V 3.5" WC for Model PG95XAT66120DAAA

This OEM two-stage combination gas valve is the factory-specified replacement for Carrier model PG95XAT66120DAAA high-efficiency gas furnaces. Originally sold under part number EF33CW206 (also EF33CW206A) and manufactured by White-Rodgers (36J56-503), this valve has been superseded by the current OEM replacement EF33CW152 — a direct, drop-in substitute supplied by Carrier's Factory Authorized Parts division. The gas valve is the gatekeeper of combustion: it receives a 24V signal from the control board, opens in two stages (low fire → high fire), and meters gas flow at a precisely regulated pressure to the burner assembly. When it fails, your furnace will typically lock out after one or more ignition attempts, display a fault code, or simply produce no heat at all despite the inducer and igniter operating normally.

• Specs: 24 VAC coil voltage | 3.5" W.C. outlet pressure | 1/2" NPT inlet & outlet | Two-stage operation (low/high fire) | Natural gas standard; LP conversion kit compatible | Valve body length approx. 5"
• OEM vs Generic: This is a Factory Authorized Parts OEM valve engineered to Carrier's exact combustion tolerances. Off-brand valves frequently drift in outlet pressure calibration, causing rich or lean combustion, nuisance lockouts, and accelerated heat exchanger wear — especially critical in a 95% AFUE condensing furnace like the PG95XAT66120DAAA.
• Install difficulty: 4/5 — Gas valve replacement is an intermediate-to-advanced repair. Required tools: 1/2" & 3/4" open-end wrenches, leak-detection solution, manometer for outlet pressure verification, and a multimeter to confirm 24V at valve terminals. Always shut off the gas supply and de-energize the furnace before beginning. Post-installation leak check and pressure verification are mandatory. Licensed technician recommended in jurisdictions requiring it.
• Warranty: 1-year OEM factory warranty on parts. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Fits Carrier PG95XAT66120DAAA 95% AFUE two-stage gas furnace. Replaces OEM part numbers EF33CW206 and EF33CW206A; current shipping part is EF33CW152 (factory-authorized direct replacement). Also cross-references White-Rodgers 36J56-503. Verify your unit's gas type (NG vs LP) before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — call or chat now.