Carrier 51HK660011 T-Stat 30067439-890 this is a single-speed

this is a single-speed

allowing technicians to set an exact operating span that matches the controller's output range

For cooling or year-round HVAC applications

When troubleshooting system failures

This specific York 24V relay is typically factory-set or application-specific

Carrier 51HK660011 T-Stat 30067439-890 this is a single-speedThe Carrier 51HK660011 is a high performance SPDT (Single Pole Double Throw) temperature control thermostat designed for precision sensing in demanding HVACR applications. This mechanical capillary thermostat features a 30 inch copper capillary tube, providing extensive reach for remote bulb sensing in air handling units, refrigeration systems, and rooftop packages. Operating across a 61F to 91F temperature range, this control is engineered for