I need to book mine in with Grippa had my 9kw a year now.
Mines booked in for next Tuesday with a local authorised Webasto service engineer.
You guys haven't changed your coolant or in line fuel filters for 2-5 years?
Yeah my other one went into lock down mode there is a way round it though,I can’t remember but Oliver did talk me through it with my 5kw heater.