1. Introduction
The MRCARTOOL 12V Diesel Air Parking Heater is a versatile heating solution designed to provide warmth in various environments, including cars, trucks, work vehicles, RVs, buses, trailers, boats, and even indoor spaces like homes and workshops. This upgraded 12V universal model ensures comfort during cold weather by rapidly heating the space and efficiently defrosting windows. It operates with low fuel and power consumption, making it suitable for extended use.

Figure 1: Product Overview
2. Product Specifications
| Feature | Specification |
|---|---|
| Rated Voltage | 12V |
| Rated Power | 5-8KW (User selectable, confirm before purchase) |
| Heater Working Temperature | -40°C ~ +40°C |
| Oil Pump Working Temperature | -40°C ~ +50°C |
| Movement Noise | 35-65dB |
| Tank Capacity | 5L |
| Fuel Consumption | 0.138-0.472 L/H |
| Recirculating Wind Flow | 30-85cfm |
| Product Size (L*W*H) | 412mm * 148mm * 372mm (16.22in * 5.82in * 14.64in) |
| Fuel Type | Diesel |
| Switch Type | LCD Switch |
| Special Features | LCD Monitor & Remote Control |
| Item Weight | 8.8kg |
| Certifications | CE, CCC, CC |
Figure 2: Product Dimensions and Specifications

3. Package Contents
Before installation, please verify that all components listed below are present in your package:

Figure 3: Included Components
- Main Heater Unit
- Exhaust Pipe
- Muffler
- Air Intake Pipe
- Remote Control
- Fuel Filter
- Fuel Pump
- Fuel Line
- Clamps and Screws
- Mounting Bracket
- User Manual (this document)
4. Setup and Installation
This section provides general guidelines for setting up your MRCARTOOL Diesel Air Parking Heater. For detailed visual instructions, please refer to the assembly video below. Ensure the heater is placed on a stable, flat surface during installation.
Video 1: Heater Assembly Guide. This video demonstrates the step-by-step assembly of the diesel air parking heater, including connecting air ducts, exhaust, fuel line, and air intake.
Installation Steps:
- **Access Internal Components:**
Unlatch the side panel clips on the main heater unit and carefully remove the side panel to expose the internal components, including the fuel tank and connection points.

Figure 4: Internal Components and Connection Points
- **Connect Warm Air Outlets:**
Attach the warm air outlet ducts to the four designated ports on the front of the heater. Secure each duct with the provided clamps, ensuring a tight fit to prevent air leakage.

Figure 5: Warm Air Outlets and LCD Control Panel
- **Install Exhaust System:**
Connect the flexible exhaust pipe to the exhaust port on the heater unit. Secure it with a clamp. Then, attach the muffler to the other end of the exhaust pipe, also securing it with a clamp. Ensure the exhaust system is routed away from flammable materials and living spaces.
- **Connect Fuel Line:**
Connect the fuel line from the fuel pump (located inside the unit) to the fuel intake on the heater. Ensure all connections are secure and free from leaks. The fuel pump should be installed vertically to ensure proper operation.
- **Attach Air Intake Pipe:**
Connect the air intake pipe to the air intake port on the heater. Secure it with a clamp. This pipe draws in fresh air for combustion.
- **Power Connection:**
Connect the 12V power cables to a suitable power source. Ensure correct polarity (red for positive, black for negative) and a secure connection to prevent electrical issues. Refer to the label on the back of the unit for specific voltage and power requirements.

Figure 6: Power Connection and Rear Fan
- **Secure Side Panel:**
Once all internal connections are made and checked, reattach the side panel and secure it with the clips.
5. Operating Instructions
Your MRCARTOOL Diesel Air Parking Heater can be controlled via the integrated LCD monitor or the included remote control.
5.1. LCD Control Panel
The LCD control panel provides real-time data display and allows for easy setting and monitoring of the heater's functions.

Figure 7: LCD Monitor and Remote Control
- **Power On/Off:** Press and hold the power button (usually marked with a circle and a line) to turn the heater on or off.
- **Temperature Adjustment:** Use the '+' and '-' buttons to increase or decrease the desired temperature.
- **Mode Selection:** Navigate through different modes (e.g., fan speed, timer settings) using the menu or arrow buttons.
- **Timer Function:** Set the 24-hour working timer for automatic shutdown. This allows you to pre-heat your space or ensure the heater turns off after a set period.
- **Monitoring:** The LCD displays current temperature, operating status, and other relevant information.
5.2. Remote Control
The remote control offers convenient long-distance operation, allowing you to start the heater and adjust settings before entering your vehicle or space.
- **Power On/Off:** Use the dedicated power button on the remote to switch the heater on or off.
- **Temperature/Settings:** The remote typically has buttons for adjusting temperature and other basic settings. Refer to the remote's specific markings for functionality.
- **Pre-heating:** Utilize the remote to start heating your vehicle or space in advance, ensuring a warm and comfortable environment upon entry.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your diesel air parking heater.
- **Fuel Quality:** Always use clean, high-quality diesel fuel. Poor fuel quality can lead to blockages and reduced efficiency.
- **Fuel Filter:** Periodically check and clean or replace the fuel filter to prevent contaminants from reaching the combustion chamber.
- **Air Intake and Exhaust:** Ensure the air intake and exhaust pipes are clear of obstructions (e.g., dirt, debris, snow). Blockages can impair combustion and lead to overheating.
- **General Cleaning:** Keep the exterior of the heater clean. Avoid spraying water directly onto the unit, especially the electrical components.
- **Electrical Connections:** Regularly inspect all electrical connections for tightness and signs of corrosion.
- **Storage:** If storing the heater for an extended period, ensure the fuel tank is empty or filled with fresh fuel and consider running it briefly before storage to clear any old fuel from the lines.
7. Troubleshooting
If you encounter issues with your heater, refer to the following common troubleshooting steps:
- **Heater Not Starting:**
- Check 12V power supply: Ensure it's connected correctly and providing sufficient voltage.
- Check fuel level: Make sure there is enough diesel in the tank.
- Inspect fuel line: Look for kinks, blockages, or air bubbles.
- Verify electrical connections: Ensure all wires are securely connected.
- **Low Heat Output:**
- Check air intake/exhaust: Ensure they are not blocked.
- Clean fuel filter: A clogged filter can restrict fuel flow.
- Adjust temperature settings: Increase the desired temperature on the LCD panel or remote.
- **Excessive Smoke/Odor:**
- Check fuel quality: Use clean, appropriate diesel fuel.
- Inspect exhaust system: Ensure it's properly installed and not leaking.
- Check for blockages: Clear any obstructions in the air intake or exhaust.
- **Unusual Noise:**
- Check for loose components: Ensure all parts are securely fastened.
- Inspect fan: Make sure nothing is obstructing the fan's movement.
- **Error Codes on LCD:**
Refer to the specific error code meanings in the full product manual (if available) or contact customer support for assistance.
8. User Tips
While no specific user tips were provided, general advice for diesel heaters includes:
- **Ventilation:** Always ensure adequate ventilation when operating the heater, especially in enclosed spaces, to prevent carbon monoxide buildup.
- **First Start-up:** During the first use, it may take a few minutes for the fuel to prime and the heater to start properly.
- **Power Consumption:** Be mindful of the 12V power draw, especially if operating from a vehicle battery, to avoid draining it.
- **Placement:** Position the heater on a stable, non-flammable surface, away from combustible materials.
9. Warranty and Support
MRCARTOOL provides comprehensive support for its products:
- **Warranty:** The main unit of the MRCARTOOL product comes with a 2-year warranty. Accessories are covered by a 1-year warranty, effective from the date the product parcel is received by the customer.
- **Technical Support:** Lifetime technical support is available from the MRCARTOOL Official Store.
- **Quality Assurance:** All products undergo strict quality tests before shipment to ensure high quality.





