Issue with flushing Thetford ensuite C2 toilet cassette
J_KZ-1 said
09:31 PM Jul 17, 2023
Good evening forum members,
hoping for some advise re the failure to flush our toilet, only happened recently. Photo of ensuite attached.
research on mr.Google and got some ideas: where the units fuse is, pump etc. Checked fuse and it was blown and replaced, wife tested the flushing (with empty tank), no result, took out cassette and checked new fuse and it was blown
inserted in new fuse: same result. This time I inserted new fuse and asked wife to try flushing while I had cassette out, no blown fuse did this two more times, same result. I inserted cassette and had wife try flushing with cassette in: bloody fuse is blown?
Can any one offer any suggestions please? And please no smart arse comments like the idiot in the next door caravan (we are staying in Gold Coast next couple days while I try and sort this out: heading further north) leave the cassette out. A real wit: bloody half wit
Also, I tried getting the pump out (again mr.Google) it was full of gunk, as was the water tank, I followed the wiring cable by hand through the water tank it seem to go up at an angle to the back of the ensuite, towards back of hand basin (refer photo). I dont wish to start pulling out external panels. Is the pump and fuse issue connected or mutually exclusiv?
Can away one please advise on both? I was toying with the idea of partially fill the tank with boiling water a few times, draining i between times, with the pump in it, to see if this would clear the gunk from the pump. Would the tank material handle boiling water?
A tricky one. Check that when you replace cassette that its not pushing some wires together that are shorting out somewhere.
Possum3 said
08:52 AM Jul 18, 2023
G'day John, I can't visualise an immediate solution to your problems, but as it "shorts out" when the cassette is inserted it may be that one of the wires is moved as they are bent by the movement or position of the cassette. The offending wire would in all likelyhood appear to be intact underneath the sheathing.
Try an experiment; Remove cassette, replace fuse, don't replace cassette but with your hand give the internal wiring a good massage to see if there is a short in the harness.
J_KZ-1 said
05:49 PM Jul 18, 2023
Thanks for reply shakey and possum. Just on the way to Roma for 2 days b4 continuing north. Just o/nighting in Warra. Might stay in caravan park in Roma and give it try. Thanks again. I'll post if it works.
darjak said
07:56 PM Jul 22, 2023
If it isnt a seized pump. Could be a broken cam had that problem.
Its an easy job just used stainless screws silicone and piece of hard plastic cutting board.
Was in the middle of nowhere when mine broke still going strong 4yrs later.
Pull out cassette
Undo screw in plunger remove (needs long fillips screwdriver)
Underneath where fuse goes in is 4 screws, two either end then the whole cam housing
will come down
Youll need a small mirror to find the screws (this is the hardest part)
Thetford cam assembly approximately $100 so if you are a reasonable handyman
its worth the effort.
Get on the net to Thetford they have all the diagrams.
Tell all users to be gentle when using the loo and use Olive oil on the cassette after cleaning.
Hope this solves the problem for you.
Darjak
The Minnow said
08:44 PM Jul 23, 2023
Hello. I had the same problem. Take the flush lever off then the panel. Take out the pump and free all the grit in the impella. I used a small syringe. The pump freed up and stopped blowing fuses. Cheers. More info if you like.
The Minnow
darjak said
02:20 PM Jul 25, 2023
I should have put new pump on net only about $10>15 so might as well just put a new on in.
laurieoz said
03:38 PM Jul 25, 2023
I have had the impeller seize up over the years a couple of times - took it out and gave it a few turns with a very small screw driver to free it up.
Last year the PCB shorted out and I had to replace it (in a very wet atmosphere)
Laurie
Good evening forum members,
hoping for some advise re the failure to flush our toilet, only happened recently. Photo of ensuite attached.
research on mr.Google and got some ideas: where the units fuse is, pump etc. Checked fuse and it was blown and replaced, wife tested the flushing (with empty tank), no result, took out cassette and checked new fuse and it was blown
inserted in new fuse: same result. This time I inserted new fuse and asked wife to try flushing while I had cassette out, no blown fuse did this two more times, same result. I inserted cassette and had wife try flushing with cassette in: bloody fuse is blown?
Can any one offer any suggestions please? And please no smart arse comments like the idiot in the next door caravan (we are staying in Gold Coast next couple days while I try and sort this out: heading further north) leave the cassette out. A real wit: bloody half wit
Also, I tried getting the pump out (again mr.Google) it was full of gunk, as was the water tank, I followed the wiring cable by hand through the water tank it seem to go up at an angle to the back of the ensuite, towards back of hand basin (refer photo). I dont wish to start pulling out external panels. Is the pump and fuse issue connected or mutually exclusiv?
Can away one please advise on both? I was toying with the idea of partially fill the tank with boiling water a few times, draining i between times, with the pump in it, to see if this would clear the gunk from the pump. Would the tank material handle boiling water?
Thanks,
John Z.
Try an experiment; Remove cassette, replace fuse, don't replace cassette but with your hand give the internal wiring a good massage to see if there is a short in the harness.
Its an easy job just used stainless screws silicone and piece of hard plastic cutting board.
Was in the middle of nowhere when mine broke still going strong 4yrs later.
Pull out cassette
Undo screw in plunger remove (needs long fillips screwdriver)
Underneath where fuse goes in is 4 screws, two either end then the whole cam housing
will come down
Youll need a small mirror to find the screws (this is the hardest part)
Thetford cam assembly approximately $100 so if you are a reasonable handyman
its worth the effort.
Get on the net to Thetford they have all the diagrams.
Tell all users to be gentle when using the loo and use Olive oil on the cassette after cleaning.
Hope this solves the problem for you.
Darjak
Last year the PCB shorted out and I had to replace it (in a very wet atmosphere)
Laurie