Hi. Folks I've just joined the forum wonder if any one can shed some light on this electrical problem. I keep my caravan at home and during the winter I keep it hooked up to keep the battery charged. During the recent cold weather I switched on the Aldi heating to keep the caravan warm I went out the other day to check on it and discovered the c line 230v fused spur had melted and burned out. Does anyone know what could have caused this. Thanks in advance.
Welcome Bob.
I expect an electrical whizz kid will come along with a definite answer but I guess that if the fault was in the Aldi system then the fuse would simply have blown and cut off the heating.
I would guess that there has been some arcing within the switch itself : either the fuse was loose or the switch was faulty causing the overheating.
You can obviously replace the switch (with the correct rated fuse) and then keep a very careful eye on it. Personally, I would keep the heating off until I got it checked out at the next service.
DaveS1
Thanks Dave I'll certainly be keeping it off I've ordered a new switch and I've got a mate who is an electrician I'll ask him to have a look. I can't fathom out why this has happened now as I've did the the same in previous winters with no problems. Oh well maybe my mate will come up with answer once he checks it out.
Arcing of the fuse holder was a common failure on the fused spur boxes used on the Truma electric heaters fitted to most caravans before the Alde unit, my guess is that they are still using the same cheap ones as they did then. I have already replaced mine with a decent one and had no problems since.
Dave.
------------- Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.
Hi Dave thanks for your input I'm still waiting for the new switch to arrive the thing is I've ordered one the same so I'm Now at a bit of a dilemma do I replace it with the Same one or maybe look for a different box with the same function. I was really surprised when I took it off the caravan wall it had actually melted the 10 amp fuse and the spare one together don't know how the smoke alarm never went off to alert me as I tested it and its working fine. Maybe not enough smoke to set it off.
A loose fitting fuse holder will cause arcing and associated heat around it, enough to melt the plastic but not enough to cause much smoke.
If it were me, I'd replace the original type as they are prone to failure, if not now, use the new one to get you bye for now but long term I'd look for a more substantial one. The good thing is you caught it early.
Is yours a black one like mine because that restricts your choice somewhat, MK don't make a black one but this Crabtree one should do.
Dave
------------- Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.
What setting did you have the Alde heating system on? I’ve seen a lot of those c line fused spurs that are only rated for 10amps, despite a 13amp fuse being fitted, if the heating was on 3kw it’s pulling 13amps plus so will easily melt the plastics as the fuse heats up. I’ve seen this happen on 3 vans.
Hi Dave. I've posted a duplicate photo of the 230v switch that melted I think these are the standard ones that elddis used bearing in mind my van is a 2011 model they might have upgraded them since then. Hi sevenexile if I remember correctly it was on 2 kw the fuse is a10amp so is the spare which is located beside it. When I put the heating on during the cold snap it was on 2kw for quite sometime before I remembered it was still on. I work away from home on the road (trucker) I only noticed it when I came home from work and checked the caravan.
Ok well at 2kw your looking at 8amps plus, so it was probably from the fact it was running for a long time, the fuse slowly getting hot and there not being a lot of room around the switch for the heat to escape etc? Seen a few when it’s on the wall next to the fridge. I would also expect the fuses if there the original to probably be cheap 10amp fuses which can make a difference.
Well guys thanks for all the advice I'll wait for the new switch get it on hopefully everything will be working as normal and closely monitor it for the next few weeks. Not forgetting to switch it off when I'm back at work.
Yes, it's no good getting paranoid about it!
I would just give the fuse holder terminals little pinch to ensure a tight fit and make sure that the end caps are clean.
Good luck!
DaveS1