ensuring perfect fit and function without system modification

How do I troubleshoot a failing start relay

the switch is likely defective and requires replacement to restore HVAC system control

65" WC Setpoint: Pre-calibrated for exact differential pressure monitoring to prevent ignition during improper venting

preserving original factory programming and safety logic

Peco Controls 74317 Thermostat 320788-703 ensuring perfect fit and functionFor service technicians requiring a reliable, no nonsense interface, the Peco Controls 74317 Thermostat stands as a professional grade solution for 1HT 1CL (1 Heat 1 Cool) systems. This non programmable thermostat is specifically engineered for high demand industrial and commercial HVAC environments where simple operation and robust durability are non negotiable. It features an intuitive digital display and provides precise electronic temperature