Carrier EF33CW152 Gas Valve 320788-704 the HC21ZE126 is the official

the HC21ZE126 is the official direct replacement for the HC21ZE126A

making it an ideal choice for low-flow applications such as fan coil units

eliminating guesswork during field repairs

It functions as the direct modern replacement for legacy models including the CTE-1105-10 and CTE-1004-10 (Select Sequence #2)

though you must ensure the secondary voltage remains at 24V

Carrier EF33CW152 Gas Valve 320788-704 the HC21ZE126 is the officialThe Carrier EF33CW152 Gas Valve is a critical replacement component for residential gas fired furnaces, specifically engineered for single stage heating applications. Operating on a standard 24V furnace control circuit, this redundant gas valve features a 1 2 inch NPT inlet and outlet, ensuring compatibility with standard manifold configurations. Preset for 3. 5" W. C. natural gas operation, the valve incorporates internal regulation to maintain