Carrier EF33CW189 Gas Valve

The Carrier EF33CW189 Gas Valve is a high-performance, two-stage natural gas valve designed for precision fuel regulation in residential and light commercial HVAC applications. Engineered by White Rodgers (Model 36H54-471) as a Factory Authorized Part, this dual-stage component features a 3/4 inch NPT inlet and outlet to handle high-capacity demands up to 300,000 BTU/HR. Operating on a standard 24V AC circuit, the valve is factory-set for 3.5 inches WC on high fire and 2.0 inches WC on low fire, ensuring optimal combustion efficiency and consistent manifold pressure. As a direct OEM replacement for legacy models EF32CW193, EF32CW194, and EF33CW188, it provides a seamless drop-in installation for contractors servicing Carrier, Bryant, and Payne RTUs and packaged units. The fast-opening characteristic and compatibility with both hot surface and direct spark ignition systems make the Carrier EF33CW189 a critical inventory item for maintaining peak system performance in demanding environments.

• OEM Compatibility: Serves as the precise Factory Authorized Part replacement for EF32CW188, EF32CW194, and more, eliminating the need for field modifications.
• Dual-Stage Precision: Provides two-stage gas control for enhanced modulation, improving energy efficiency and fuel management across varying heating loads.
• Industrial Build Quality: Constructed to withstand ambient temperatures ranging from -40°F to 175°F, ensuring reliable operation in extreme mechanical room conditions.
• High-Flow Capacity: The 3/4" NPT connection supports high-volume gas flow with a maximum pressure rating of 1/2 PSI for large-scale equipment.

Is the EF33CW189 compatible with LP gas systems?
This valve is factory-configured for Natural Gas. To use it with Liquid Propane, a specific LP conversion kit must be sourced and installed by a qualified technician.

What ignition systems will this valve work with?
The EF33CW189 is versatile, supporting Direct Spark Ignition (DSI) and Hot Surface Ignition (HSI) setups typically found in modern Carrier packaged units.

Can this replace a single-stage gas valve?
No, this is a dedicated two-stage gas valve. It requires the internal wiring and control logic of a two-stage furnace or RTU to operate both high and low firing rates correctly.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.