Thermal overload relays are devices that monitor your HVAC system's internal temperature and shut the unit down if they detect it overheating. With your HVAC unit off, the compressor will return to a sustainable temperature, and the relays will turn the system back on once it reaches that point. Adding a compressor overload protector can safeguard your HVAC system. Located nearby the condenser, this special sensor monitors temperatures, shutting down the compressor temporarily to prevent it from overheating.
