Sorry chaps/chapesses, another wee toilet thread

Oct 27, 2017
522
263
Kinross
MH
Hymer A Class
Exp
5 years
Hi, my Thetford 260 fan has stopped working. I know some folk disable it anyway but I’ve just spent £20 on a new filter! I’m struggling to determine whether the fan has gone pop or the PCB has blown.

I’d like to put 12v directly on the fan to see if it works or not. I’m reluctant to try to dig it out yet as this will destroy the foam seal between it and the cassette and I’m not sure the fan can be pulled directly out of the recess if I do rip off the seal.

There’s a four way spade connector nearby which looks as if it goes towards the fan (or maybe the PCB which is perhaps more likely). On the power side there’s 12 volts on two pins and nothing on the other two. The fan will only have two wires. Is there any way to deduce whether the fan is good from this? I do have a 12v source if I can get directly to the fan.

Thanks.
 
Last edited:
May 2, 2016
1,123
1,328
Rhone Alps
MH
Bavaria 2011.
Exp
Since 2001
As above. Test with a multi meter. you can buy them on ebay for around £15. Useful bit of kit to have with a MH. Test the connection to the fan and see if you have power coming through.
 
OP
G-RMPS
Oct 27, 2017
522
263
Kinross
MH
Hymer A Class
Exp
5 years
I have a mulitmeter and used it to test the four pins on the plug. I was asking whether anyone knew which of these (if any) connect directly to the fan.
 
Oct 14, 2007
2,277
531
Rochester
MH
Coachbuilt
Exp
12
My fan packed up, its just a small 40mm or 30mm PC fan that you can get of e-bay for about £5 you want the one with 2 wires, some have an extra 3rd sensing wire when used in a computer. The Thetford replacement is £50. When I took the original out it was exactly the same make/model as the one of e-bay
 
Oct 14, 2007
2,277
531
Rochester
MH
Coachbuilt
Exp
12
I'm struggling to remember the seal, is it square with a whole in it? I didn't replace or make a new one so I must have salvage the original and used that, if it's what I'm thinking of then it was closed cell foam like neoprene, so easily sourced if you need to make a replacement. I remember the wiring was tight as it was trapped under the toilet outer housing.
Sorry I can't be any more help.
 
OP
G-RMPS
Oct 27, 2017
522
263
Kinross
MH
Hymer A Class
Exp
5 years
Ok, thanks. I’ll plan to make one from neoprene assuming I can source a fan (if, indeed, it is the fan that’s duff!).
 
OP
G-RMPS
Oct 27, 2017
522
263
Kinross
MH
Hymer A Class
Exp
5 years
Mouser.com sell the identical fan for about £10, but with postage comes to £24! You can get similar but not identical fans from China for less than a fiver but delivery could be weeks. I got a sample size of adhesive-backed neoprene for £1.50.
 
Apr 26, 2015
384
211
Bedfont
MH
Don't own one yet
Exp
I'm a newbie
I'm not familiar with this particular fan, however, low voltage fans sometimes get a flat spot on a bearing and stop turning, if a little push gets it working then it's time for a new fan.
 
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