1. Introduction
Thank you for choosing the VEVOR KLC-FJ-Y/5-A1 8KW Diesel Air Heater. This portable diesel heater is designed to provide efficient and reliable heating for various applications, including vehicles, RVs, camping tents, and other outdoor spaces. Featuring dual-motor variable-frequency control, it ensures precise heat management and reduced fuel consumption. Please read this manual thoroughly before installation and operation to ensure safe and optimal performance.
2. Safety Information
Your safety is paramount. Adhere to all warnings and instructions to prevent injury or damage.
- Fuel Type: Use diesel fuel ONLY. Using other fuel types can cause severe damage or fire.
- Ventilation: The exhaust pipe MUST be vented outdoors or outside the vehicle to prevent carbon monoxide poisoning. Ensure adequate fresh air supply in the heated area.
- Installation: Ensure all connections are secure and leak-free before operation. The heater should be placed on a stable, non-combustible surface.
- Clearance: Maintain adequate clearance from combustible materials. Do not block air inlets or outlets.
- Overheating Protection: The heater is equipped with over-temperature protection. If it overheats, it will shut down automatically. Do not bypass this safety feature.
- Fuel Cap: Always use the provided spill-proof fuel cap to prevent leaks.
- Children and Pets: Keep children and pets away from the operating heater.
- Maintenance: Perform regular maintenance as described in this manual. Disconnect power before any maintenance.

Image: Safety features of the VEVOR Diesel Heater, highlighting the spill-proof cap, exhaust pipe insulation sleeve, and visible fuel level for secure use.
3. Package Contents
Verify that all items are present in the package:
- 1 x Diesel Heater
- 1 x Exhaust Pipe
- 1 x Heat Insulation Sleeve
- 2 x Air Ducts
- 1 x Power Cord
- 1 x Remote Control
- 1 x Muffler
- 1 x User Manual (this document)
- 4 x Air Duct Connectors
- 4 x Nuts
- 2 x Air Outlets
- 1 x Fuel Funnel

Image: Visual representation of the VEVOR Diesel Heater and its complete set of accessories included in the package.
4. Setup and Installation
Follow these steps for quick and secure installation:
- Prepare the Heater: Ensure the heater is on a stable surface. Fill the fuel tank with diesel using the provided funnel. Do not overfill.
- Install the Side Exhaust Pipe: Connect the exhaust pipe to the designated port on the side of the heater. Ensure it is securely fastened.
- Install the Heat Insulation Sleeve: Slide the heat insulation sleeve over the exhaust pipe. This helps prevent heat transfer to surrounding surfaces.
- Install the Air Duct: Attach the air ducts to the air outlets. Use the air duct connectors if extending the ducts.
- Vent Exhaust: Ensure the exhaust pipe is routed safely outdoors or outside the vehicle/tent to prevent carbon monoxide buildup.
- Connect Power: Connect the power cord to the heater and a suitable power source (DC 12-24V vehicle battery, 12V/12A power station, or standard AC outlet with an adapter, not included).

Image: Visual instructions for the 1-minute tool-free installation process, detailing how to connect the exhaust pipe, heat insulation sleeve, and air duct.

Image: Overview of the versatile power options for the VEVOR Diesel Heater, showing compatibility with power stations, AC outlets (adapter needed), and vehicle batteries.
5. Operating Instructions
The VEVOR Diesel Air Heater offers both LCD panel and remote control operation.
5.1 Initial Start-Up
After connecting power and filling the fuel tank, press the power button on the LCD panel or remote control. The heater will initiate a self-check and then begin the heating process. Warm air can be delivered in as little as 2 minutes.
5.2 Temperature Control
Use the LCD panel or the remote control to adjust the desired temperature. The temperature adjustment range is 50-113°F (10-45°C). The dual-motor variable-frequency control system precisely adjusts combustion airflow and warm-air output for stable heating.
5.3 Remote Control Operation
The remote control allows you to operate the heater from up to 98 ft (30 m) away. This is ideal for preheating your vehicle or space before entry.

Image: Demonstrates remote preheating of a vehicle using the VEVOR Diesel Heater, highlighting the remote control's range and functionality.
5.4 Fuel Efficiency
The heater consumes approximately 0.03-0.1 gal/h (0.12-0.37 L/h) of diesel, offering high combustion efficiency (≥82%). The 1.6-gallon (6 L) fuel tank allows for extended operation.

Image: Highlights the VEVOR Diesel Heater's fuel efficiency, indicating low consumption and high combustion efficiency for prolonged use.
5.5 Shutting Down
To turn off the heater, press the power button on the LCD panel or remote control. The heater will enter a cool-down phase before completely shutting down. Do not disconnect power during the cool-down phase.
6. Maintenance
Regular maintenance ensures the longevity and efficient operation of your VEVOR Diesel Air Heater.
- Cleaning: Periodically clean the exterior of the heater with a soft, damp cloth. Ensure air inlets and outlets are free from dust and debris.
- Fuel Filter: Check the fuel filter for blockages or contamination. Replace if necessary.
- Exhaust System: Inspect the exhaust pipe and muffler for any damage or blockages. Ensure the exhaust is clear and properly vented.
- Electrical Connections: Verify that all electrical connections are secure and free from corrosion.
- Storage: When storing the heater for extended periods, drain any remaining fuel from the tank. Store in a dry, cool place.
7. Troubleshooting
If you encounter issues with your heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater does not start | No power, low fuel, clogged fuel line, faulty ignition. | Check power connection, refill fuel tank, inspect fuel lines, contact support if ignition issue persists. |
| Low heat output | Blocked air intake/outlet, incorrect temperature setting, low fuel quality. | Clear obstructions, adjust temperature, use fresh diesel fuel. |
| Excessive smoke | Poor combustion, incorrect fuel-air mixture, dirty burner. | Ensure proper ventilation, check fuel quality, clean burner components (professional service recommended). |
| Unusual noise | Loose components, fan obstruction, motor issue. | Inspect for loose parts, clear fan area, contact support for motor issues. |
| Remote control not working | Dead batteries, out of range, interference. | Replace batteries, move closer to heater, reduce interference. |
For issues not listed or if problems persist, please contact VEVOR customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | KLC-FJ-Y/5-A1 |
| Operating Voltage | DC12-24V |
| Net Weight | 21.8 lbs / 10.5 kg |
| Product Dimensions | 20.08 x 8.66 x 16.54 inches (515 x 220 x 465 mm) |
| Power | 8KW (3.16 KW heating power) |
| Temperature Adjustment Range | 50-113°F / 10-45°C |
| Fuel Consumption | 0.03 - 0.1 gal/h (0.12 - 0.37 L/h) |
| Fuel Tank Capacity | 1.6 Gal / 6 L |
| Heating Area Coverage | 161-377 ft² / 15-35 m² |
| Max Elevation for Stable Operation | 16404 ft / 5000 m |

Image: Technical specifications and a visual breakdown of the VEVOR Diesel Heater's dimensions and components.
9. Warranty and Support
VEVOR products are designed for durability and performance. For specific warranty details regarding your KLC-FJ-Y/5-A1 Diesel Air Heater, please refer to the warranty card included with your purchase or visit the official VEVOR website.
If you require technical assistance, have questions about operation, or need to report a defect, please contact VEVOR customer support through their official website or the contact information provided in your product packaging. When contacting support, please have your model number (KLC-FJ-Y/5-A1) and purchase date available.
VEVOR Official Website: www.vevor.com







