macclad Posted July 22, 2013 Share Posted July 22, 2013 warning light comes on for waist tank saying full when empty Link to comment Share on other sites More sharing options...
Derek Uzzell Posted July 23, 2013 Share Posted July 23, 2013 There are various systems used to sense the contents-level in motorhome waste-water tanks, so It would be helpful to know which make, model and build-year of vehicle you are referring to. I think (based on your earlier postings) that you might own a Chausson Welcome 55, but I don't know how old it might be, nor, in fact, whether you are referring to your own motorhome. I also don't know which type of waste-water tank contents-level sensing system a Welcome 55 would have but, if that's what you've got, another owner who is a forum-member might. Possibly the most common arrangement involves a simple, small swinging-float electrical switch like this one http://www.ebay.co.uk/itm/Horizontal-Tank-water-level-sensor-liquid-float-switch-for-Tank-Pool-/200927895167 mounted in the side of the waste-water tank close to the top. Until the tank approaches full, the float hangs down with the switch's contacts 'open'. When the level of waste-water in the tank approaches full, the switch's float is raised, the switch's contacts are 'closed' and a warning light on the motorhome's control-panel illuminates. If a float-switch becomes gunged up and sticks in the closed position, the warning light will remain constantly lit even though the tank itself is empty. Other possibilities might be a faulty float-switch, poor electrical contacts at the switch or a control-panel fault. As I said earlier, there are alternative systems to the float-switch one. If you inspect the waste-water tank, it should be relatively straightforward to decide which type of sensing system has been used. Problems with waste-water tank contents-level indicators are far from rare - see below: http://www.motorhomefun.co.uk/tech-mech-general/45575-waste-tank-level-sensor.html http://www.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Waste-tank-electrical-connection/27074/ http://www.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Waste-Tank-Level-indicator/29420/#M339161 Link to comment Share on other sites More sharing options...
macclad Posted July 23, 2013 Author Share Posted July 23, 2013 many thanks yes it is 55 2004 Link to comment Share on other sites More sharing options...
MikeBR Posted August 16, 2013 Share Posted August 16, 2013 Derek Uzzell - 2013-07-23 7:54 AM Problems with waste-water tank contents-level indicators are far from rare - see below: http://www.motorhomefun.co.uk/tech-mech-general/45575-waste-tank-level-sensor.html http://www.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Waste-tank-electrical-connection/27074/ http://www.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Waste-Tank-Level-indicator/29420/#M339161 The indicator in our LMC works the other way round :-D When almost full,it indicates 1/4 full :-D However-the fresh water tank indicator works well,so, as most of what goes into the waste tank comes from the fresh tank,I know that when fresh tank is low-waste tank will be getting full. After a time you get to know how many days you can go before having to empty. Mike. Link to comment Share on other sites More sharing options...
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