1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the Kindgreat Thermo 90 24V Flame Detector, model 82407B. This component is designed for compatibility with Webasto Diesel Parking Heaters. Please read this manual thoroughly before installation and use to ensure safe and efficient operation.
2. Safety Information
Always observe the following safety precautions:
- Disconnect power to the heater system before attempting any installation, maintenance, or repair.
- Ensure all electrical connections are secure and properly insulated to prevent short circuits.
- Installation should be performed by qualified personnel familiar with vehicle electrical systems and heater components.
- Use only genuine or compatible replacement parts.
- Refer to the Webasto Diesel Parking Heater's original manual for specific safety guidelines related to the heater unit itself.
3. Product Overview
The Kindgreat Thermo 90 24V Flame Detector (model 82407B) is a critical safety component for Webasto Diesel Parking Heaters. Its primary function is to monitor the presence of a flame within the combustion chamber, ensuring safe and controlled operation of the heater. If no flame is detected when expected, or if the flame extinguishes unexpectedly, the detector signals the heater control unit to shut down, preventing fuel accumulation and potential hazards.

Figure 3.1: Complete assembly of the Kindgreat Thermo 90 24V Flame Detector 82407B. This image shows the flame sensor tip, wiring, and connector.
The detector consists of a heat-resistant sensor tip, wiring, and a connector designed to integrate seamlessly with the Webasto Thermo 90 heater system. It operates on a 24V electrical system.

Figure 3.2: Close-up view of the flame sensor tip, showing its robust construction and wiring connections. This part is inserted into the combustion chamber.

Figure 3.3: Detail of the wiring and pin connectors, designed for secure electrical connection to the heater's control unit.
4. Setup & Installation
Proper installation is crucial for the correct functioning of the flame detector. Refer to your Webasto Diesel Parking Heater's service manual for detailed instructions on accessing the combustion chamber and replacing the flame detector.
- Preparation: Ensure the heater system is completely cooled down and the vehicle's battery is disconnected to prevent accidental startup or electrical shock.
- Access: Carefully remove any covers or components necessary to gain access to the existing flame detector within the heater's combustion chamber.
- Removal of Old Detector: Disconnect the electrical connector from the old flame detector. Carefully unmount the old detector from its position. Note its orientation for correct installation of the new part.
- Installation of New Detector: Insert the new Kindgreat Thermo 90 24V Flame Detector (82407B) into the designated opening in the combustion chamber. Ensure it is seated correctly and securely fastened according to the heater manufacturer's specifications.
- Electrical Connection: Connect the electrical plug of the new flame detector to the heater's wiring harness. Ensure the connection is firm and fully seated.
- Reassembly: Reinstall all covers and components that were removed to access the detector. Double-check that all fasteners are tightened appropriately.
- Testing: Reconnect the vehicle's battery. Perform a functional test of the Webasto heater according to its operating instructions to confirm the new flame detector is working correctly. Observe for any error codes or unusual operation.

Figure 4.1: The flame detector showing the OE part number 82407B, confirming the correct replacement part.
5. Operation
The Kindgreat Thermo 90 24V Flame Detector operates automatically as part of the Webasto Diesel Parking Heater system. It continuously monitors the presence of a flame during the heater's operation cycle. It does not require manual intervention for its primary function.
- Upon heater startup, the detector verifies flame ignition.
- During operation, it ensures the flame remains stable.
- If the flame fails to ignite or extinguishes, the detector sends a signal to the heater's control unit, initiating a safety shutdown.
Refer to your Webasto heater's user manual for specific operating procedures of the heater unit itself.
6. Maintenance
The Kindgreat Thermo 90 24V Flame Detector is designed for durability and typically requires minimal maintenance. However, periodic inspection is recommended as part of your overall heater system maintenance schedule.
- Visual Inspection: During routine heater servicing, visually inspect the flame detector's tip for any signs of carbon buildup, corrosion, or physical damage.
- Cleaning: If carbon buildup is observed, carefully clean the sensor tip using a soft brush or cloth. Avoid abrasive materials that could damage the sensor surface. Ensure the heater is cool and disconnected from power before cleaning.
- Wiring Check: Inspect the wiring and connector for fraying, cracks, or loose connections. Secure any loose connections and replace damaged wiring if necessary.
- Replacement: If the flame detector shows signs of significant wear, damage, or if the heater system consistently reports flame detection errors despite other components being functional, consider replacing the detector.
7. Troubleshooting
If your Webasto Diesel Parking Heater is experiencing issues related to flame detection, consider the following troubleshooting steps. Always refer to your heater's specific diagnostic codes and troubleshooting guide.
| Symptom | Possible Cause | Solution |
|---|---|---|
| Heater fails to start or shuts down shortly after ignition. | Flame not detected (faulty detector, carbon buildup, fuel supply issue). |
|
| Heater displays a "no flame" or "flame out" error code. | Flame detector malfunction, poor connection, or actual flame failure. |
|
For complex issues or if troubleshooting steps do not resolve the problem, it is recommended to consult a qualified service technician.
8. Specifications
| Feature | Detail |
|---|---|
| Product Name | Kindgreat Thermo 90 Flame Detector |
| Model Number | 82407B |
| Compatibility | Webasto Thermo 90 Diesel Parking Heaters |
| Voltage | 24V |
| Part Type | Heater Burner Replacement Part, Flame Sensor |
| Material | High quality, durable materials (as per product description) |
| Item Weight | 50 Grams |
9. Support & Warranty
For technical assistance, warranty claims, or further information regarding the Kindgreat Thermo 90 24V Flame Detector, please contact your retailer or the manufacturer, LOTOAK. Keep your purchase receipt as proof of purchase.
Specific warranty terms and conditions may vary by region and retailer. Please refer to the documentation provided at the time of purchase for detailed warranty information.