it has likely failed and requires replacement

Enhanced Equipment Safety: Designed to lock out the system if unsafe airflow or pressure drops occur

Both refer to the same Mueller W04068 part designed for 1-3/8" outside diameter copper tubing

mitigating the risk of HVAC freeze damage

York 026-37540-000 Molecular it has likely failed andThe York 026 37540 000 Dehydrator 100 Molecular is a professional grade refrigerant filter drier core engineered specifically for high capacity chiller maintenance and industrial HVAC systems. This OEM York part utilizes a specialized 100% molecular sieve desiccant to provide maximum moisture adsorption and acid removal from the refrigerant circuit. As a critical component in safeguarding the compressor and expansion valves, this dehydrator core