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toilet cassett ful light


geraldbianchi

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I have a thetford C 200 toilet where the cassett full light does not work. I have checked the fuse, its OK.

The inside of the cassett has a soft (rubber ?) circular piece beneath what I believe is the sensor which determins the level of the waste. Should there be a "float" attached to this sensor?

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Within the toilet-cassette there should be a 'float-arm' attached to the cassette's side-wall. The float-arm carries a magnet that triggers a sensor-switch (external to the cassette and located in the cassette's housing) when the cassette is approaching full.

 

The following link shows an exploded view of a C-200's Holding Tank (cassette)

 

http://www.leisureshopdirect.com/caravan/water/thetford_cassette_toilets/Thetford_Toilet_C-200S__Thetford_C-200CS_Cassette_and_Spares.aspx?pdf=13730&pdf_page_id=-1&dpn_id=-1&sch=0

 

and the Float Arm is number 22 (Thetford Part No: 23726).

 

There are quite a few suppliers of Thetford parts (at various prices). For example:

 

http://www.campingrus.co.uk/Thetford-C200-Cassette-Toilet-Float-Arm

 

Violent shaking of a cassette when cleaning/rinsing it can detach, or displace, the float-arm from its mounting on the cassette's inner wall. I've never needed to replace a float-arm myself, but the following thread suggests that it should not be too difficult to re-attach it:

 

http://www.motorhomefacts.com/ftopic-754.html

 

If you find that there is a float-arm in your cassette and it appears to be properly attached to the cassete's side-wall, then the problem may well lie with the external sensor-switch.

 

If your C-200 is getting on in years, it's now possible to purchase a Fresh-up Kit for about £80. This is quite a bargain when you consider the total asking-prices of all the bits it contains. It's also a cheap(ish) way of obtaining a 2nd C-200 cassette as the normal asking-price of the cassette on its own often exceeds £100. Plenty of UK suppliers - for example:

 

http://www.thecaravanshop.co.uk/toilets-chemicals/thetford-cassette-fresh-up-kits/thetford-cassette-for-c200-toilets/prod_775.html

 

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There is also a Thetford Fresh-Up Kit for the older C2/C3/C4 bench-toilet range from 1994 onwards:

 

http://www.thecaravanshop.co.uk/toilets-chemicals/thetford-cassette-fresh-up-kits/thetford-c2-3-4-tank-kit/prod_702.html

 

These toilets are 'handed' according to whether the cassette is inserted into the bench-unit from the left or right end. Thetford used to market 'left hand' or 'right hand' cassettes to match the bench-unit, but the cassette provided in the Fresh-Up Kit can apparently be converted to suit both bench-unit types.

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Derek Uzzell - 2011-06-03 7:58 AM

 

 

Violent shaking of a cassette when cleaning/rinsing it can detach, or displace, the float-arm from its mounting on the cassette's inner wall. I've never needed to replace a float-arm myself, but the following thread suggests that it should not be too difficult to re-attach it:

 

http://www.motorhomefacts.com/ftopic-754.html

 

 

As you might guess from the "soubriquet", the post referenced was mine.

 

It was indeed not difficult to fix once I'd worked out what was wrong - the pivot points "snap" between lugs inside the cassette - but it needs to be done by feel, you can't see what you are doing.

 

Edit

 

....and to confirm, I simply re-attached the float, I didn't need any new parts.

 

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