webasto/aux heater not working

[kasperhenriksen]

hello, i have a problem with my 2016 t6, the webasto/aux-heater starts but after some minutes it stops. i have had diagnostics and it shows : B138E4B. Coolant temperature - excessesive temperature.
has anyone had similar problem before? thanks

 

[mmi]

2016 t6

Diesel or petrol?
Can you hear that heater's coolant pump is running?
Can you monitor with your diagnostics tool coolant temperatures in and around the heater?

Webasto doesn't work - Caravelle T6

Do you have any idea why it stops by itself? The cause is stored in fault codes (of controller 18-Aux. Heat)

www.t6forum.com