and draining of hydronic heating loops

if your diagnostic testing indicates the furnace control is not receiving a signal from the flame sensor

Microprocessor Reliability: Delivers precise logic for gas valve modulation and blower delays to optimize airflow

Key Benefits Precise Pressure Control: Adjustable setpoint range of 8-35" wc allows for fine-tuning based on specific combustion equipment requirements

making it a staple for light commercial and standard residential boiler applications

York S1-2702-316P/A Limit Switch 340793-762 and draining of hydronic heatingThe York S1 2702 316P A Limit Switch is a critical safety component engineered for precise thermal regulation within York and Johnson Controls HVAC systems. This HVAC high limit switch functions as a primary safety cut out, monitoring heat exchanger temperatures to prevent overheating conditions that can lead to equipment failure or hazardous operation. As a direct replacement for S1 2702 3161 A, as well as the S1 2702 316P and S1 2702 316PA models,