Hi. Can anyone help I have a 2016 Burstner Nexxo 745 with a Dometic fridge fault. It blows the 10a fuse in the fuse box situated under the front pasenger seat. When moving the fuse blows immediately blows when 12v selected and now when gas is selected it runs for several hours the the fuse blows again It would seem fine on 240v. The fridge has never been serviced. Any ideas please