The whale water pump on my new (to me) Lunar Quasar 615 (2004) keeps running and won't stop even when all the taps are off.
I have read various other threads discussing faulty microswitches as a possible cause and others discussing the adjusting of the pressure relief valve.
How do I know if my van is fitted with microswitches and how do I locate them / ascertain which one is faulty?
Hi tazhearts, Micro switches usually under taps, to access them take off the 4 screw covers at each corner of the tap take out screws and lift out tap unit the micro switches are on each tap, your pump may have a pressure adjustment screw, if I remember correctly!!!, with taps closed, try turning pump screw down, if pump stops, then open tap a little way at first, then turn pump screw up until rump runs, close tap pump should stop if it is correctly set, you may have to try it a few times to get it right, hopefully others with the same pump will be along shortly an set you right if this info is not accurate. Hope that helps in the meantime.
------------- If everything runs smoothly then I must have done something wrong
If in Doubt Check it Out.
If you have pressure switch, with taps closed turn screw anti-clockwise up, not down until pump stops.up reduces cut of pressure, down increases pressure.If you have taps with micro-switches and you can get your hand up underneath the switches are held by a clip.
I would expect on a 2004 model van, for the water system to be pressurised and not reliant on microswitches, as Birdman has aluded towards.
Take a look near where your water inlet is on the inside of the van (next to water heater probably) and look for the pressure switch there, will look something like this...
Adjust as Birdman suggests and you should find system will shut the pump off when water not in demand.
The other possibility though is that you may have lost an 'o' ring off the pump connector which would cause air to enter the system, therefore preventing pressure to build up.
Adjusting Pressure Switches 1) Turn off all taps. 2) Turn on isolation switch to operate pump. If the pump doesn't work turn the knob on the pressure switch clockwise until it does. 3) Open taps to clear air in system, turn taps off. 4) With the pump running and taps off, turn the knob on the pressure switch anticlockwise until the pressure switch "clicks" and the pump switches off. 5) Open the cold tap, the pump should come on within one second with a single click. If it doesn't, turn the knob on the pressure switch clockwise slightly until it does. Close the tap, the pump should switch off, try again. 6) Try the hot tap, it should come on within seven seconds, it doesn't turn the knob on the pressure switch clockwise slightly until it does. Close the tap, the pump should switch off within seven seconds, try again. With a good pressure switch and using these steps above the pump should work when you want it and stop when you want it to. If it doesn't there could be one or all of four problems 1)If the pressure switch keeps clicking turning the pump on and off, and you have noticed black bits coming out of the tap, the filter has broken, needs to be replaced and the pressure switch needs to be cleaned out. 2) The diaphragm has split in the pressure switch and the pressure switch needs to be replaced. 3)If it doesn’t work at all check the 12v supply to it.
4) Check the micro switch inside the pressure switch, (the most unlikely)
------------- the only silly question is the one you do not ask.
Hi birdman101, thanks for the correction info on the pressure switch, was not sure which way it actually worked, I also forgot to mention the O ring,must still be suffering from caravan withdrawal symptoms as my little trip away has ended, glad OP got the right info. thanks
------------- If everything runs smoothly then I must have done something wrong
If in Doubt Check it Out.
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Topic: Microswitches
