OEM Carrier 2-Stage Natural Gas Valve EF33CW204 for Model PG9MXA048080AASA

This is the factory OEM replacement 2-stage combination gas valve for the Carrier PG9MXA048080AASA 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 precisely metered natural gas flow to the burners. A failed gas valve typically produces a no-heat condition, repeated ignition lockout faults, or a furnace that lights briefly then shuts down. This White-Rodgers 36J55-503 valve is the direct factory-specified replacement and replaces the superseded part number EF33CW191.

• Specs: 2-stage operation | Natural gas | 24V AC coil | 1/2" NPT inlet × 1/2" NPT outlet | Hi-stage regulated at 3.5" W.C. | Lo-stage regulated at 1.5" W.C. | White-Rodgers 36J55-503 cross-reference
• OEM vs Generic: This is a genuine Carrier OEM valve manufactured to exact factory tolerances. Aftermarket gas valves may not match stage-switching pressures precisely, risking improper combustion, nuisance lockouts, or unsafe gas pressure delivery.
• Install difficulty: 3/5 — Gas valve replacement requires shutting off the gas supply at the shutoff cock and verifying zero pressure before disconnecting. Tools needed: adjustable wrench, 1/4" nut driver, manometer for outlet pressure verification, pipe thread sealant. Always leak-test all connections with approved leak-detection solution before restoring power. If you are not a licensed technician, consult a qualified HVAC professional.
• Warranty: 1-year OEM manufacturer warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG9MXA048080AASA gas furnace. Also replaces superseded Carrier part number EF33CW191. Verify your unit's gas type (natural gas) and inlet/outlet pipe size on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.