Product description

The Heatcraft 7075819 is a genuine OEM 3-wire defrost termination and fan delay switch used in commercial evaporator coil assemblies. This Klixon-type termination switch mounts directly onto 3/8" OD refrigerant tubing via its spring-tension mounting clip, monitoring coil temperature to control both the end of the defrost cycle and the delay before the evaporator fans resume operation. The switch is factory-calibrated to open at 50 degrees F and close at 2 degrees F, ensuring the fans only restart once the coil has returned to a sufficiently cold temperature, preventing warm, moist air from being blown into the refrigerated space after a defrost cycle. It is supplied with three 17" color-coded leads (blue, red, and black) for straightforward integration into standard 3-wire defrost/fan delay wiring diagrams, and is a widely used component across Heatcraft, Bohn, and Larkin evaporator coil systems.

Product highlights

• Dual-Function Control: Manages both defrost cycle termination and fan delay from a single switch.
• Precise Factory Calibration: Opens at 50 degrees F and closes at 2 degrees F for consistent, repeatable defrost cycles.
• 3/8" Tube Mount Clip: Spring-tension clip snaps directly onto standard refrigerant tubing for accurate coil temperature sensing.
• Color-Coded 3-Wire Leads: 17" blue, red, and black leads simplify wiring to existing defrost control circuits.
• Wide OEM Compatibility: Used across Heatcraft, Bohn, and Larkin walk-in cooler and freezer evaporator units.

Specs

• Manufacturer: Heatcraft
• Manufacturer Part Number: 7075819
• Component Type: Defrost Termination / Fan Delay Switch
• Switch Type: Klixon-Type Termination Switch
• Wiring: 3-Wire, 17" Leads (Blue, Red, Black)
• Open Temperature: 50 degrees F
• Close Temperature: 2 degrees F
• Mounting: Spring-Tension Clip for 3/8" OD Tubing

Direct replacement models

Heatcraft 7075819, 5709L, H50892

You will receive the same product or an OEM-Equivalent that meets the highest standard of the OEM with warranty that will be a direct-fit. Designed in the USA with superior quality to the OEM.