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Subject Topic: External pump permanently running
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Message posted by TonyPC on 26/3/2014 at 9:36pm
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I am a novice with owning a caravan and would be grateful of any advice.
I have purchased a 2004 Bessacarr cameo 525sl which I love but the external water pump is permanently live. The switch for internal or external pump is lit permanent. I have read in the forums that it could be the microswitch in the taps yet when I select the internal pump for the internal tank the switch's are working fine to stop and start the internal pump. I don't know whether this means the taps are ok or not.
I would appreciate any help and advice anyone could give me
Have a good season everybody and keep safe.

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Message posted by jeff juke on 27/3/2014 at 9:58am
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Give the pump a good shake inside a barrel of water it sounds as if there may be air in it while running.

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JEFF................

Message posted by VangoMan02 on 27/3/2014 at 2:01pm
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I agree with jeff,thats the first thing to try.
Switch of pump, remove pump from caravan inlet. Shake or gently move the pump up and down for 20 secs whilst in water barrel.
Reconnect to van inlet ,switch on pump,it will run for a little while then it should switch off.

I always put pump in water barrel first, give it a little shake and then connect to inlet.. then switch on pump.
Less chance of air in system this way imo.

If pump still runs all the time you may have a leak somewhere or a faulty non return valve.

Post last edited on 27/03/2014 14:37:33

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Message posted by blueexpo97 on 27/3/2014 at 2:55pm
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Could not have put it better myself.     off
Love it when the Boy Scouts have a meeting in the nearest phone box.

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Message posted by birdman101 on 27/3/2014 at 3:38pm
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Click on this link and read page 26&41 and check switch positionshttp://assets.swiftgroup.co.uk/uploads/HandBooks/caravans/Previous%20Tourer%20Handbooks/1051572000%20Caravan%20Owners%20Hbook%202004.pdf

Message posted by DaveS1 on 27/3/2014 at 3:44pm
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Agree it sounds like an airlock to me. Suggest you fill the water container then run the hot tap that is furthest away from the water inlet for a couple of minutes or so. When any bubbling or spluttering stops, turn the tap off and all should be well.
Good luck.
Daves1

Message posted by VangoMan02 on 27/3/2014 at 4:18pm
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Quote: Originally posted by blueexpo97 on 27/3/2014
Could not have put it better myself.     off
Love it when the Boy Scouts have a meeting in the nearest phone box.



Come on blue boy keep your personal life private..

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Message posted by TonyPC on 27/3/2014 at 4:28pm
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Thank you for advice everybody still no luck.
With my onboard tank full and with the external pump switched off on the control panel the pump is still running. The 3 way switch for the internal, external pump, or off position is lit permanent for the external pump. Plenty of head scratching going on here

Message posted by Bill Terry on 27/3/2014 at 4:48pm
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Are you sure your microswitches are ok? Try and listen on each tap if you can actually hear the switch clicking.

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nant mill.N/Wales
just dont go there.

Message posted by jeff juke on 27/3/2014 at 5:00pm
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Just a thought,could it be the "O"ring on the pump? Wrap a piece of electrical tape round it and plug back in ?? This will take up space if the system is depressurizing.

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JEFF................

Message posted by G7ACU on 27/3/2014 at 5:17pm
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Quote: Originally posted by TonyPC on 27/3/2014
... The 3 way switch for the internal, external pump, or off position is lit permanent for the external pump.


Do you mean it's lit for external pump regardless of the switches position, or only when the external pump is selected?

I wouldn't be sure if that van would use a pressurised system or micro-switches, but as suggested check for switches beneath each tap (one could have failed and be permanently on), or if no switches then a failure within the pressurised system somewhere; NR valve, pressure switch etc.



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Message posted by TonyPC on 27/3/2014 at 6:01pm
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To try and fix the problem I've changed my inlet from a crystal compact to a ultra flow and put a new NRV behind it, I have also tried two new pumps. My water system is full and not leaking. The microswitch taps are all working fine with the internal pump I can hear it turning on and off. The external pump runs whether the switch is off, on or selected for internal pump. And the light for the external pump stays on regardless of the switch position.
It's like there is a permanent live to the external pump. Turning off the 12v switch is the only thing that stops the pump running.
When you turn the taps on or off the internal pump is working fine.
Thanks again to anyone taking the time and effort to help me, I have already fixed my electric toilet pump and changed my water inlet due to reading posts from members. What a friendly helpful bunch

Message posted by Bill Terry on 27/3/2014 at 6:25pm
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Is it possible that the 3 way switch isnt shot at?

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Roughing it in style at Calloose caravan and camping holiday park nr St Ives.
Its not a hangover, its wine flu!


nant mill.N/Wales
just dont go there.

Message posted by TonyPC on 27/3/2014 at 6:36pm
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I have had the switch plate off the wall, there are no obvious wires not connected, but I am thinking this problem must be electrical. I know lots about bricklaying but bugger all about electrics. I haven't a clue about testing. If anyone can help I think I will need the instructions for idiots guide.

Message posted by jeff juke on 27/3/2014 at 7:52pm
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Another thought i had, you didnt say you were on ehu or not.

If your trying to run it on battery only check the batteries volts incase its a duff battery.

your looking for 12.8volts

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JEFF................

Message posted by TonyPC on 27/3/2014 at 8:10pm
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Yes I'm hooked up for power and I don't think it's the battery as the previous owner had this problem. I could tell that they didn't really know what was causing it as they explained the problem. I changed the battery a few weeks ago just in case that had anything to do with the problem. I guess it probably needs a multimeter test. But as for where to get a reading and what I'm looking for I haven't got a clue

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