Carrier 51HK660011 T-Stat 30067439-890 70" WC and a multimeter

70" WC and a multimeter to check for continuity across the 1/4" terminals when the set point is reached

ensuring the system resets only once the temperature has dropped to a safe 135°F

Standard Sizing: Features 3/8" x 3/8" ODF connections for seamless brazing into existing liquid and distributor lines

Precision Control: Features 15-minute intervals for flexible 24-hour scheduling

preventing the dry spots or uneven saturation that can lead to reduced output and mineral buildup

Carrier 51HK660011 T-Stat 30067439-890 70" WC and a multimeterThe 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