In article , "Dave Plowman (News)"
writes
The mains to 12v power supplied failed in a mate's motorhome, so although
he got it replaced I offered to look at it to see if it could be repaired
as a spare.

It is branded PowerPart, and is a 20 amp 13.8v device which charges the
leisure battery as well as running any 12v things when on mains. Cost
about 100 quid.

It was well and truly fried. Only heatsink for the power Mosfets was the
thin ally case - and a small cooling fan. Not that much for a device
likely mounted inside a cupboard of some sort.

Rectifier was short circuit and a transformer burnt with half the
laminations lying loose inside the case, so gave up.

Get a Zig. And I don't think any of my leisure vehicles including, 2
campervans, one motorhome and 5 caravans having a cooling fan.
--
bert