Bohn Defrost Thermostats

Overview

The BOHN 5709l is a defrost thermostat designed for use in refrigeration systems such as unit coolers and evaporator coils. It monitors coil temperature and controls the defrost cycle by opening and closing at set temperature thresholds, helping prevent ice buildup and maintain efficient system operation. The thermostat features a 3-wire lead configuration with a lead length of 17 inches and is built with a combination of plastic and stainless steel construction. It closes at 35 degrees F and opens at 55 degrees F, providing a reliable operating range for standard low-temperature refrigeration applications. This component is typically installed by refrigeration technicians and commercial HVAC-R service professionals. The BOHN 5709l is suited for commercial and light-industrial refrigeration equipment where automatic defrost control is required. It is commonly installed on evaporator coil assemblies in walk-in coolers, reach-in cases, and unit cooler systems. The 3-wire lead design accommodates standard defrost control wiring configurations found in these applications. Its compact sensor body and stainless steel material make it appropriate for the wet, low-temperature environments typical of refrigeration coil compartments. Key Features Opens at 55 degrees F and closes at 35 degrees F for precise defrost cycle control 3-wire lead configuration with 17-inch lead length for flexible installation routing Stainless steel and plastic construction suited for cold, humid…