No water pumping.... (1 Viewer)

[oaktree11]

Hello all, I have a very strange problem with my Burstner Aviano. We lived in it for a month between houses and then we parked it up for a month.
When I parked it I drained the water out and at that stage all was fine.
this weekend we went away and when we arrived I filled the water tank turned on the 12v and the pump switch and....nothing! no pumping on either tap or the toilet flush. I can hear the microswitch clicking on each but no action. The pump does not start at all when a tap is turned on.
OK, I have checked the pump fuse and its ok. The 12v works, all lights etc ok. I have put a 12v supply on the pump in the water tank and it spins up fine. I have removed the control panel and the pump switch has 12v going to it.
I am now officially stumped. Anyone got any ideas? I have the feeling that I must be missing something because it was perfect when I parked it and nothing has happened in between (except possibly rodents? but I think that is unlikely?)
Failing everything else, does anyone have any recommendations for who might be able to fix it in the Cheddar, Somerset area?
Thanks in advance for the help
John

 

[Jaws]

Check the control panel .. If it is like the Autotrail and some of the older Burstners there is the ability to switch from internal to external pump..

 

[pappajohn]

Possible mickey damage.
The little buggers get everywhere and just love the taste of pvc wiring.

Turn on a tap and check voltage AT the pump.

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[rangi]

This fella is in Street (Somerset?) Don't know if he is close enough for you

SRB Caravan and Motorhome services 07540065649

Simon Baker, used him when the joker here in Cornwall made one hell of a mess of our Pump, (water pipe bent at such an angle the water couldn't get through)

 

[oaktree11]

Thanks for the replies so far guys
Much appreciated

 

[Armytwowheels]

You have Somerset Motorhomes not that far from you if that's any help?

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[oaktree11]

Just so I am clear when I get the energy to take another look at this! Can I assume that the wiring of this system is fairly simple?
I am thinking the two taps and the toilet flush switch are in parallel so that any of them switch the pump?
If that's the case the logical thing is for the wiring to come from the pump switch on the master panel to the kitchen tap (closest) then into the bathroom for the shower and flush.
I will check to see if there is 12v across the pump when a tap is opened but I doubt it so the likelihood is a lack of continuity from the panel to the pump.
Does this sound reasonable?
John

 

[MattR]

Just a thought but would an air lock cause these symptoms - I know that you would normally hear the pump trying to work but maybe not always. Perhaps you could try sucking water through a tap and see if that gets the pump going.

 

[Scout]

Just thinking "outside the box" and keeping it simple,

your pump worked when you added power from a seperate sorce?

it did not work when you switched "on" any tap

so is your power "on"?

is it the same on mains and 12volt?

is the "other" 12volt services working?

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[Gaston aires]

On a Hymer I once had, there was an outside Master switch located in the outside utilities locker. Some times this used to get switched off by accident. Worth a try.
Phil

 

[mitzimad]

is there a relay to switch the pump when the micro switches make the circuit?i would test for 12v at the switches if yes then search for a relay. if there is a relay there maybe two fuses one on trigger side and one on power side i know nothing about your system just throwing ideas into the mix

 

[oaktree11]

Thanks again to all. All suggestions valued and certainly help me get my thoughts in order, that's the value of this forum.
John

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[oaktree11]

Just a final post now that the problem is sorted.
After much messing around, it was finally traced to a bad connection in a plug on the control panel circuit board. Desperation and just unplugging and reconnecting plugs found it. What a nightmare!
It just goes to show though these odd, one off, simple faults can be hell on earth to trace.
Thanks again to all who helped
John