Thetford toilet fan won’t turn off! (1 Viewer)

Jimbob45

Free Member
Sep 23, 2015
51
26
Tamworth
Funster No
38,760
MH
A class
Exp
Since 2010
Our Thetford toilet has a built in fan which comes on automatically when the flush button is pressed. Normally you can switch the fan off with a white button next to the flush button, but it’s stopped working. The only way to stop it is by switching off the main power to the whole van and then back on again. It’s under warranty but we’re away at the moment and wondered if it was a simple fix. Any ideas?
 

TheBig1

LIFE MEMBER
Nov 27, 2011
15,916
33,785
Dorset
Funster No
19,048
MH
A class
Exp
many many years! since I was a kid
no easy fix, its the little control board
 
Feb 24, 2013
12,053
95,326
Bolsover, Derbyshire
Funster No
24,833
MH
Hymer S800
Exp
not long enough
Sounds like you have a simple fix (y)

Failing that don’t flush, just open flap and let gravity take over :)

Is it an after market fitting? Or SOG?

Subscribers  do not see these advertisements

 
OP
Jimbob45

Jimbob45

Free Member
Sep 23, 2015
51
26
Tamworth
Funster No
38,760
MH
A class
Exp
Since 2010
Sounds like you have a simple fix (y)

Yep, unless it’s dark and all the lights go off too!
:D
Failing that don’t flush, just open flap and let gravity take over :)

I normally do, depends of course if there is anything left behind to flush...:)

Is it an after market fitting? Or SOG?
It’s thetfords own, filter and fan built in.
 

DP+JAY

LIFE MEMBER
Mar 17, 2010
2,417
14,559
Dalbeattie
Funster No
10,674
MH
Laika 5009
Exp
since 2007, 25 years tuggin before that.
Should also go off on its own on a timer if you don't press the other button. I bypassed the circuit board on ours & took a feed from the micro switch on the flap so the fan starts as the flap opens & stops as it closes. It was a pain if we forgot to press the button before being seated.
DP

Subscribers  do not see these advertisements

 

old-mo

Funster
Extra Special
LIFE MEMBER
Oct 16, 2008
16,251
87,362
Weymouth. Dorset...
Funster No
4,470
MH
PVC...Vantage "NEO".
Exp
Caravan & motorhome 45 + yrs
It’s thetfords own, filter and fan built in.

Micro switch in the cassette cupboard may have moved a little ...

And not touching the cam properly...

Couple I have had the switch is only held on/in by some sort of double sided tape..
 
Oct 14, 2007
3,219
2,580
Rochester
Funster No
619
MH
Auto-Trail Mohawk
Exp
14 fun filled years
If you can get the control panel off the loo unplug the fan from the PCB

Subscribers  do not see these advertisements

 
Oct 27, 2017
1,074
2,073
Perth
Funster No
51,142
MH
Hymer A Class
Exp
Since 2014
Our fan is under a Thetford filter, under the cassette. You could snip one of the connecting wires.
 
Jul 29, 2013
7,412
11,136
Salisbury
Funster No
27,215
MH
Hymer B678DL A class
Exp
since 2011
Had a problem with ours when the dam thing kept flushing, I discovered that due to poor siting of the button right underneath the wash basin water was getting in behind the panel and there was a little green corrosion around some of the soldering on the circuit board so got a soft tooth brush and cleaned it off not had trouble since and as temporary fix stuck a strip of gaffa tape accross the top to stop water ingress,(y)(y)(y)
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
36,947
79,243
On the coast in West Sussex
Funster No
658
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
Our microswitch occasionally slips of the bracket. I remove the cassette and push the spring clip back up.

Micro switch in the cassette cupboard may have moved a little ...

And not touching the cam properly...

Couple I have had the switch is only held on/in by some sort of double sided tape..
That's only on a SOG. The Thetford is a timer triggered by the flush switch

Subscribers  do not see these advertisements

 
Last edited:
Oct 27, 2017
1,074
2,073
Perth
Funster No
51,142
MH
Hymer A Class
Exp
Since 2014
You can disconnect the fan by pulling the white connect with a red & black wires off the PCB.

Is that the PCB where the switch is located, or the one behind a cover at the back of the cassette locker?
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
36,947
79,243
On the coast in West Sussex
Funster No
658
MH
Hymer B678 Dynamic Line
Exp
Since 2008 & many years tugging
Is that the PCB where the switch is located, or the one behind a cover at the back of the cassette locker?
It's behind the panel, I disconnect mine as I have a SOG and the fan was running but not doing anything.

PCB is behind this panel. I can reach mine from inside the cupboard.
IMG_20190317_143332.jpg


IMG_20190317_143435.jpg

Subscribers  do not see these advertisements

 
OP
Jimbob45

Jimbob45

Free Member
Sep 23, 2015
51
26
Tamworth
Funster No
38,760
MH
A class
Exp
Since 2010
Thanks everyone, mine is the same as Lenny’s , so I’ll try to get behind the panel and disconnect the wire for now, until we can get it sorted under warranty.
 

Funsters who are viewing this thread

Top