BROADWAY Electrical Fault , 328 or Fridge ?

I have an electrical fault in my Broadway 2011 EK
I first noticed this when connecting my hook up cable at Home .
The Sargent Display read Mains Off .
I checked for 240v and even used a different Hook up cable .
However I then realised that the Microwave worked and there was
Power at all 3 pin sockets .
The Thetford Fridge would not come on , no life on fridge display panel .
If I switch off the charging switch on top of the Sargent 328 , and then switch it back on again ,
The Fridge comes to Life . It sometimes stays on for hours , but other times goes off in seconds .
The Sargent 328 is in the Wardrobe , and on 3 occasions after resetting it , and looking to see the Fridge is on ,
I then close the Wardrobe door and the Fridge immediately goes off . So shutting the door switches off the Wardrobe light ,
Seemingly a drop in the 12 volts causes the 328 to switch off Fridge .
I have had to replace No. 3 Fuse ( 5 amp ) twice .
If I thought the fault was the 328 , I can get it checked/repaired by Sargent for £80 .
But if it is the Thetford causing the problem ?
The Fridge seems to work fine on 12v when travelling
Anybody point me in the right direction?
Cheers Peter Cornwell
,

See other thread in Technical.

Hi Peter

Please don't post identical questions on more than one sub forum. It always leads to confusion, and is unlikely to get you the best possible response if members can't discuss and debate a possible answer in a single thread.

No worries - I'll close this thread and leave it to the other one. 

https://www.autosleeper-ownersforum.com/t26738-broadway-electrical-fault-328-or-fridge#220637