Toilet not flushing

[AndieN]

Hi,  just brought the caravan out for the first time in a few months and the toilet refuses t flush. It is a Thetford toilet with electric flush.  I have checked the fuse in the main fuse box and can't see any other in line fuses.

 

Any suggestions?

[WispMan]

Hi. It would help if you put your car and make of caravan and year in your details. 

Some loos have a fuse in the lower cassette area on a little printed circuit board. Purple 3A fuse towards the rear. 

What make and model of loo? 

[Steamdrivenandy]

Thetford toilet flush pumps often 'stick' after a period of dry inactivity. All it takes is a twizzle of the pump's central spindle to get it working again. Access to the pump depends on the model toilet involved and there are lots of Youtube videos showing how. 

[Mutley]

20 hours ago, AndieN said:

Hi,  just brought the caravan out for the first time in a few months and the toilet refuses t flush. It is a Thetford toilet with electric flush.  I have checked the fuse in the main fuse box and can't see any other in line fuses.

 

Any suggestions?

Model of toilet is important to guid you further 

[ReggiePerrin]

15 hours ago, Mutley said:

Model of toilet is important to guid you further 

Assuming original fitment, it will be a Thetford C260 series.

 

1. No fuse in the cassette compartment 
2. Pump is extracted through the top of the flush tank having removed the flush button sticker and underlying control/flush button  PCB
3. The Control/flush button PCBs mounted directly above the open topped flush tanks are known to be susceptible to the damp atmosphere in which they live.

The C260 series has what Thetford describe as a self resetting fuse but it  will additionally be fused through one of the caravan’s 12v fuseways - often shared with the main water pump.

Generally, if the washroom light dims when the flush button is pressed, the pump impeller is stuck.  No dimming indicates an electrically failed pump or a failed flush button PCB

 

[Alfie T]

Had the same problem 

it was the impeller stuck it had scale on it just cleaned it up still working ok

[MalH]

13 minutes ago, Alfie T said:

Had the same problem 

it was the impeller stuck it had scale on it just cleaned it up still working ok

[iansoady]

The other problem is corrosion of the connections / push button contacts due as said to the damp conditions. Daft design if you ask me.

[Steamdrivenandy]

I notice on a number of recent model caravans the blue flush button is fitted in cabinetry some distance from the toilet and the cabinet behind which contains the water tank. Presumably this is an attempt to remove the susceptible bits from the damp atmosphere atop the tank.

[iansoady]

Yes, I've considered making something like that but other projects always seem to take priority.....