Question about Thetford Porta Potti
Red light is just a reed switch that turns on the LED when a floating magnet inside the cassette floats up (when the cassette is full) and switches on the reed switch thereby switching on the LED. It just tells you the cassette is full and you need to empty it.
I'd say either your button or electric valve is broken. All the button does is allow the electric valve to break the seal that allows water to flow from your onboard water system.
I'll assume that the water in the rest of your motorhome is working?
So check the switch first.
You can lever off the switch/LED panel and remove the square connector from the back of the button. Get a multimeter and set it to either Continuity or Resistance (Ohms). Place the connectors on 2 of the switch pins and press the switch (the switch is actually 2 switches with 4 pins, but each pair of pins is connected together) - if you get a beep (if multimeter on continuity) or low resistance reading (if on resistance) then the switch is working - if this is the case then it's probably the electric valve. If the switch is not working, then that's your culprit.
When you replace the connecter you can replace it either way round.
Posted on Apr 21, 2010
Our c200cs only has the red light come on when it is three flushes from a full waste tank as an indication to empty it. Our van is 2008, so the model may have changed, but I doubt it.
Posted on Feb 15, 2010
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Posted on Jan 02, 2017
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