The Derale 16728 is a single-stage thread-in thermostatic switch used to control an electric cooling fan. It turns the fan on at 180°F and off at 165°F, cycling the fan automatically to hold coolant temperature in range. The compact thread-in probe installs directly into a coolant passage and is rated for a maximum continuous load of 15 amps, making it a simple, reliable control for a universal single-fan setup.
Specifications:
- Type: single-stage thread-in fan control thermostatic switch
- Turn-on temperature: 180°F
- Turn-off temperature: 165°F
- Sensor thread size: #6-32
- Maximum continuous draw: 15 amps
- Application: universal electric fan control
- Part number: 16728
FAQ
What does the Derale 16728 do?
It is a thermostatic switch that automatically turns an electric cooling fan on and off based on temperature, helping maintain coolant temperature.
At what temperature does it switch?
The switch turns the fan on at 180°F and off at 165°F.
What is the amp rating?
It is rated for a maximum continuous load draw of 15 amps.
How does it install?
It is a thread-in probe with a #6-32 sensor thread that mounts directly into a coolant passage.
Is it universal?
Yes. The 16728 is a universal single-stage fan control switch and is not specific to any one vehicle.

