Air conditioning controls and refrigeration controls include cooling equipment relays that help ensure your AC and refrigeration equipment starts and runs smoothly. They provide additional starting torque for residential and commercial AC units, heat pumps, refrigerators, and freezers with start assist kits. Defrost thermostats can be used as exact OEM replacements for most refrigerators and icemakers. Dual pressure controls combine high-pressure compressor protection with low-pressure cycling or safety functions to protect commercial refrigeration and air conditioning systems. Choose a head pressure control that features high-temperature bypass, heat pump override, and adjustable hard-start timing and motor cutout speed. A heat pump reversing valve can turn your heat pump from a heater to an air conditioner and back.