1. Introduction
The FASS HK-1001 Electric Heater Kit is designed to enhance the performance of FASS HD/Titanium/Platinum Series fuel systems in cold weather conditions. This kit provides supplemental heat to the fuel, assisting with cold starts and preventing fuel gelling, which can occur at low temperatures. The heater operates automatically, activating when the ignition is turned on and deactivating once the optimal temperature is reached.
2. Safety Information
- Always disconnect the vehicle's battery before beginning any electrical installation.
- Ensure all electrical connections are secure and properly insulated to prevent short circuits.
- Wear appropriate personal protective equipment (PPE) during installation, including safety glasses and gloves.
- Refer to your vehicle's service manual for specific wiring diagrams and safety procedures.
- Do not attempt to modify the heater kit components. Use only as directed.
3. Package Contents
Verify that all components listed below are present in your FASS HK-1001 Electric Heater Kit:
- Electric Heater Element
- Wiring Harness
- Fuse and Fuse Holder
- Electrical Connectors and Terminals
- Brass Fitting (if applicable)

Figure 1: FASS HK-1001 Electric Heater Kit Components. This image displays the complete FASS HK-1001 Electric Heater Kit. It includes a long, coiled black wiring harness, a cylindrical heater element with a threaded end, various electrical connectors, a fuse, and a brass fitting. These components are designed for integration into FASS HD/Titanium/Platinum Series fuel systems.
4. Setup and Installation
This section outlines the general installation procedure. For detailed, model-specific instructions, refer to the comprehensive installation guide provided with your FASS fuel system or consult the FASS website.
- Prepare the Vehicle: Ensure the vehicle is parked on a level surface, the engine is off, and the battery is disconnected.
- Locate Heater Ports: FASS Titanium Series pumps are equipped with two dedicated ports for electric heaters. Identify the appropriate port(s) for heater installation.
- Install Heater Element: Carefully thread the electric heater element into the designated port on the FASS fuel pump. Ensure it is securely tightened to prevent leaks.
- Connect Wiring Harness: Connect the wiring harness to the heater element. Route the harness away from hot or moving engine components, securing it with zip ties or clamps as needed.
- Electrical Connections:
- Connect the power wire (typically red) of the heater kit to a switched 12V power source that is active when the ignition key is in the 'ON' position. An 'add-a-fuse' connector may be used for this purpose, ensuring the correct fuse rating is maintained.
- Connect the ground wire (typically black) to a suitable chassis ground point on the vehicle.
- Install the provided fuse into the fuse holder and ensure it is properly seated.
- Verify Connections: Double-check all connections for tightness and proper insulation.
- Reconnect Battery: Reconnect the vehicle's battery terminals.
- Test System: Turn the ignition key to the 'ON' position (without starting the engine) and listen for the heater to activate. The heater will automatically shut off once the desired temperature is reached.
5. Operating Instructions
The FASS HK-1001 Electric Heater Kit operates automatically. When the vehicle's ignition is turned to the 'ON' position, the heater will begin to warm the fuel within the FASS system. This process continues until the fuel reaches a pre-determined optimal temperature, at which point the heater will automatically deactivate. This ensures that fuel is at an ideal temperature for engine starting and operation, especially in extremely cold environments, helping to prevent fuel gelling and improve overall system efficiency.
6. Maintenance
The FASS HK-1001 Electric Heater Kit is designed for minimal maintenance. Regular inspection of the following components is recommended:
- Wiring: Periodically check the wiring harness for any signs of wear, fraying, or damage. Ensure all connections remain secure.
- Heater Element: Inspect the heater element for any physical damage or corrosion.
- Fuse: If the heater is not functioning, check the fuse for continuity and replace it with a fuse of the same rating if blown.
No user-serviceable parts are contained within the heater element itself. If a component is found to be faulty, replacement of the entire kit or specific faulty component is recommended.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater not activating | Blown fuse, loose electrical connection, faulty power source, faulty heater element. | Check and replace fuse. Verify all wiring connections are secure. Test power source for 12V when ignition is ON. If all else fails, the heater element may be faulty and require replacement. |
| Heater always on (does not shut off) | Faulty temperature sensor within the heater element. | The heater element may be faulty and require replacement. Disconnect power to prevent overheating until replaced. |
| Fuel gelling despite heater operation | Extreme cold beyond heater's capacity, insufficient power to heater, incorrect installation. | Ensure proper installation and power supply. Consider additional cold weather precautions for extremely low temperatures. |
8. Specifications
- Model Number: HK-1001
- Compatibility: FASS HD/Titanium/Platinum Series Fuel Systems
- Operation: Automatic On/Off based on fuel temperature
- Dimensions (Product): Approximately 16 x 12 x 2 inches (packaged)
- Item Weight: Approximately 0.01 ounces (packaged)
- Manufacturer Part Number: HK-1001
- OEM Part Number: HK1001
9. Warranty and Support
For information regarding product warranty, technical support, or replacement parts, please contact FASS customer service directly. Refer to the official FASS website or your purchase documentation for contact details and warranty terms specific to your region.





