1. Introduction
The Derale 16759 Adjustable Fan Controller is an electric fan thermostat kit designed to manage the operation of up to two electric cooling fans in automotive applications. This unit provides precise temperature control, activating fans within an adjustable range to maintain optimal engine temperature. It includes necessary components for installation and features an A/C override circuit for integrated system control.
2. Safety Information
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Always disconnect the vehicle's battery before performing any electrical work. Ensure all connections are secure and properly insulated to prevent short circuits and electrical fires. Consult a qualified automotive technician if you are unsure about any installation steps.
3. Key Features
- Adjustable Temperature Range: Allows setting the fan turn-on temperature from 150°F to 240°F.
- Automatic Turn-Off: Fans turn off automatically at 10°F below the set turn-on temperature.
- High Capacity: Designed to activate up to two fans with a combined maximum continuous draw of 25 amps.
- Push-In Radiator Probe: Includes a sensor for easy installation into radiator fins.
- Heavy-Duty Relay: Equipped with a 40/60 amp relay for reliable operation.
- A/C Override Circuit: Integrates with the vehicle's air conditioning system to activate fans when A/C is engaged.
- Complete Installation Kit: Comes with a relay wire harness and electrical connectors.
4. Package Contents
Verify that all components are present before beginning installation:
- Derale 16759 Adjustable Fan Controller Unit
- Push-in Radiator Probe
- Relay Wire Harness
- Electrical Connectors
Image 4.1: Included wiring harness, electrical connectors, and push-in radiator probe.
5. Technical Specifications
| Specification | Value |
|---|---|
| Model Number | 16759 |
| Brand | Derale |
| Maximum Continuous Amperage | 25 Amps |
| Turn-On Temperature Range | 150°F - 240°F |
| Turn-Off Temperature | 10°F below turn-on temperature |
| Relay Type | Heavy Duty 40/60 Amp |
| Probe Type | Push-in Radiator Probe |
| Product Dimensions | 4.38 x 7 x 2.25 inches |
| Item Weight | 0.5 Pounds (8 ounces) |
| Material | Plastic |
| Color | Black |
| UPC | 083277167591 |
Image 5.1: The Derale 16759 Fan Controller unit, illustrating its compact size relative to a human hand.
6. Setup and Installation
This section provides general guidelines for installing the Derale 16759 Adjustable Fan Controller. For detailed wiring diagrams and specific vehicle applications, refer to the included instructions or consult a professional.
6.1. Pre-Installation Checks
- Ensure the vehicle's battery is disconnected.
- Verify that the total amperage draw of your electric fans does not exceed 25 amps continuous.
- Identify a suitable mounting location for the controller unit, away from excessive heat and moisture.
6.2. Mounting the Controller
Secure the controller unit using appropriate fasteners in a location that allows for easy access to wiring and temperature adjustment, while protecting it from direct exposure to elements.
Image 6.1: The main Derale 16759 Fan Controller unit, showing its mounting bracket.
6.3. Installing the Radiator Probe
- Locate a suitable position in the radiator fins, typically near the upper hose, where the probe can accurately measure coolant temperature.
- Carefully push the probe between the radiator fins until it is securely seated. Ensure it does not interfere with fan blades or other moving parts.
- Route the probe wire away from hot engine components and secure it with cable ties.
6.4. Wiring Connections
The controller includes a relay wire harness and electrical connectors for simplified wiring. Follow the provided wiring diagram for your specific application. Key connections typically include:
- Power Input: Connect to a fused 12V constant power source.
- Ground: Connect to a reliable chassis ground.
- Fan Output: Connect to the positive lead(s) of your electric fan(s).
- Ignition/Switched 12V: Connect to a source that is active when the ignition is on.
- A/C Override: Connect to the A/C compressor clutch wire or a dedicated A/C signal wire to activate fans when the A/C is on.
Ensure all connections are crimped securely and insulated with heat shrink tubing or electrical tape to prevent corrosion and short circuits.
Image 6.2: The Derale 16759 Fan Controller, showing the relay and electrical terminals for wiring connections.
7. Operation
The Derale 16759 Fan Controller is designed for automatic operation once the desired temperature is set.
7.1. Adjusting Turn-On Temperature
- Locate the adjustment screw on the controller unit. This is typically a small potentiometer.
- Using a small flat-head screwdriver, carefully turn the adjustment screw to set the desired fan turn-on temperature within the 150°F - 240°F range. Turning clockwise typically increases the temperature, while counter-clockwise decreases it.
- Start the vehicle and allow it to reach operating temperature. Monitor the coolant temperature to verify that the fans activate at your desired setting.
- The fans will automatically turn off when the temperature drops 10°F below the set turn-on temperature.
Note: Fine-tuning may be required to achieve optimal cooling performance for your specific vehicle and driving conditions.
8. Maintenance
The Derale 16759 Fan Controller is designed for minimal maintenance. Regular checks can help ensure its longevity and proper function.
- Wiring Inspection: Periodically inspect all wiring connections for signs of wear, corrosion, or loose terminals. Ensure insulation is intact.
- Probe Condition: Check the radiator probe for secure seating and any damage. Ensure it is clean and free of debris that could affect temperature sensing.
- Controller Unit: Keep the controller unit clean and free of excessive dirt or moisture. Ensure its mounting remains secure.
- Fuse Check: If fans fail to operate, check the in-line fuse (if applicable in your installation) for continuity.
9. Troubleshooting
If you experience issues with your Derale 16759 Fan Controller, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Fans do not turn on. | No power to controller; Blown fuse; Loose wiring connection; Faulty probe; Incorrect temperature setting; Faulty fan(s). | Check power supply and ground connections. Inspect and replace fuse if blown. Verify all wiring is secure. Check probe for damage or improper seating. Adjust temperature setting. Test fans directly. |
| Fans run continuously. | Probe not properly seated or damaged; Controller set too low; A/C override active; Short circuit in wiring. | Ensure probe is securely seated and undamaged. Increase turn-on temperature setting. Check A/C override wiring. Inspect wiring for shorts. |
| Fans cycle on/off too frequently. | Probe placement; Temperature setting too close to operating temperature. | Relocate probe to a more stable temperature area. Adjust turn-on temperature to allow for a wider operating window. |
| Controller unit buzzing or clicking rapidly. | Water ingress; Internal short; Faulty relay. | Inspect unit for moisture. Check wiring for shorts. The relay may need replacement if faulty. Consider adding additional sealing to the unit if exposed to elements. |
If problems persist after attempting these solutions, contact Derale customer support or a qualified automotive technician.
10. Warranty and Support
Derale products are manufactured to high standards. For specific warranty information regarding the 16759 Adjustable Fan Controller, please refer to the documentation included with your purchase or visit the official Derale website.
For technical assistance, installation questions, or to report a product issue, please contact Derale customer support:
- Manufacturer: Derale
- Website: www.derale.com (Example, actual link not provided in JSON)
- Contact Information: Refer to the Derale website for current contact details.