Resideo TG510A1001 Thermostat Guard 320788-702 this thermal-actuated relay serves as

this thermal-actuated relay serves as an essential HVAC replacement part for maintaining furnace performance and preventing short-cycling

unobstructed atmospheric break

Most failures result from debris or moisture in the system causing a restriction

Key Benefits ASME CSD-1 Compliance: Meets strict jurisdictional codes for manual reset secondary protection on steam and primary protection on hot water systems

Resideo TG510A1001 Thermostat Guard 320788-702 this thermal-actuated relay serves asThe Resideo TG510A1001 is a professional grade Versaguard Universal Thermostat Guard designed to prevent unauthorized setpoint adjustments and physical tampering in commercial or residential environments. Built with a clear acrylic cover and a durable opaque polystyrene wallplate, this "small" series guard provides a secure enclosure without obstructing the visual display of the controller. For technicians performing retrofits, the TG510A1001 is the