Bard Defrost Thermostats

Overview

The BARD 8408-032 is a defrost thermostat designed for use in HVAC systems where coil icing must be detected and controlled. The thermostat operates at setpoints of 32 degrees F and 45 degrees F, triggering and terminating the defrost cycle at those temperatures. It monitors evaporator or outdoor coil surface temperature and sends a signal to initiate defrost when ice accumulation reaches a threshold. Licensed HVAC technicians install this component as part of routine defrost control maintenance or system repair. Proper defrost cycling protects compressor efficiency and extends equipment service life. This defrost thermostat is suited for residential and light commercial HVAC applications. Based on the raw title reference to unit designations 24, 30, and 36 UHPQC, this part is associated with BARD UHPQC series equipment. It is typically found in heat pump and packaged unit configurations where outdoor coil defrost management is required. Installation is performed during scheduled maintenance or when defrost control failure is diagnosed through system troubleshooting. Key Features Initiates defrost cycle at 32 degrees F coil temperature Terminates defrost cycle at 45 degrees F coil temperature Designed for HVAC system defrost control applications Compatible with BARD UHPQC series unit sizes 24, 30, and 36 OEM replacement part for reliable defrost cycle performance Compatibility Per the supplier title, this defrost thermostat is used on BARD UHPQC series HVAC units in the 24,…