| Option/ Additional Information |
Possible cause | Remedy |
|---|---|---|
| Vehicle heating system or fan incorrectly adjusted | Prior to putting the heater into operation, set the vehicle heating system to 'warm' and fan to speed setting 1 or higher | |
| Cooling system not completely bled | Bleed cooling system in accordance with manufacturer's directions | |
| Incorrect integration into cooling system | Integrate heater into flow pipe of vehicle's heat exchanger | |
| Vehicle fan cannot be switched on | Webasto fan relay defective | Check operation of relay. Check switching signal at relay pin 86 |
| Vehicle fan cannot be switched on | Defective 25 A fuse in Webasto fuse holder | Replace fuse |
| Vehicle fan cannot be switched on | Incorrect integration of Webasto fan relay in vehicle | Correctly integrate Webasto fan relay |