OEM Carrier 2-Stage Natural Gas Valve EF33CW204 for Model PG9MXA060100AASA

This is the OEM factory-specified combination gas valve for the Carrier PG9MXA060100AASA 96% AFUE two-stage gas furnace. The gas valve is the heart of your furnace's fuel delivery system — it receives a 24V signal from the control board and opens to allow natural gas flow to the burners for ignition. On a two-stage unit like the PG9MXA060100AASA, it modulates between low-fire and high-fire stages to maximize efficiency and comfort. When this valve fails, you'll typically see a no-heat condition, furnace lockout after ignition attempt, or error codes indicating no gas pressure or flame sense failure. This is a White-Rodgers Gemini Series 36J55 Type 503 valve — the same unit installed at the factory.

• Specs: 24V coil voltage | 0.430A current draw | Natural gas | Two-stage (Lo/Hi) operation | White-Rodgers 36J55-503 | Replaces superseded P/N EF33CW191
• OEM vs Generic: OEM gas valves meet exact factory pressure differential and flow rate specifications. Aftermarket valves can introduce off-spec gas pressure, triggering nuisance lockouts or, worse, unsafe combustion — always use OEM on gas-carrying components.
• Install difficulty: 3/5 — Shut off gas supply and disconnect power before starting. Tools needed: adjustable wrench, pipe thread sealant (gas-rated), manometer for pressure verification, multimeter. A licensed HVAC technician is recommended for gas valve replacement in most jurisdictions.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MXA060100AASA two-stage 96% AFUE gas furnace. Also cross-references to Bryant and Payne models sharing the EF33CW204 specification. Always verify your existing valve's part number and voltage rating against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before placing your order.