Help please. Water pump stopped working.

[MC 55 FUN]

As above.

Sharons' cousin & his wife are isolating in our Motorhome

The water tank has adequate water in it, the water pump has been working perfectly since Sunday, just now when the water pump switch is turned on the operation light does not illuminate, there's no sound from the pump & consequently no water comes out of the taps.

I've checked & double checked the fusebox fuse & replaced it twice with no effect. The Moho instruction book is unsurprisingly useless.

All help & advice gratefully received.

Thank you.

 

[ctc]

Pressure operated or micro switch?

 

[MC 55 FUN]

Pressure operated or micro switch?

I don't know, how do I tell please ?

 

[berni109]

If it's got wires going into the bottom of the tap its microswitch

 

[MC 55 FUN]

I don't know, how do I tell please ?

To draw water from the taps / shower we normally switch the pump on, the green illumination lamp alights, the pump makes noise, we open taps & hey presto.

Now we switch the pump on, the green lamp flickers, there's no pump noise & no water from any taps.

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[MC 55 FUN]

If it's got wires going into the bottom of the tap its microswitch

Are the taps likely to be fuse protected if they are microswitched please ?

 

[icantremember]

Probably a silly question but I assume the leisure batteries are not totally flat?

 

[ontheroadagain]

We have owned two Elddis motorhomes. Both used Whale pumps which are pressure operated.
You will need to check if power is getting to the pump. If it is, your pump is likely to be faulty.

 

[rupert]

are you sure you have 12v power..
which van is it

 

[MC 55 FUN]

Probably a silly question but I assume the leisure batteries are not totally flat?

The Moho is hooked up to the mains.

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[MC 55 FUN]

are you sure you have 12v power..
which van is it

Elddis Majestic 195.

The Moho is hooked up to the mains, everything else works.

 

[rupert]

I assume your on EHU is the charger switched on

 

[two]

Try another tap (maybe you've already done so).

Do you have any kind of 12V tester?

When did the pump last work?

 

[Janine]

Technical but hit the pump with a hammer? Worked for me

 

[MisterB]

i think what people are trying to suggest, is first make sure you actually have 12v power from the leisure battery, then that you def have 12v power to the pump itself - there are different types of pumps, those that are operated by pressure so that whn the taps open, the pressure drops and the pump starts, others are operated by micro switches that operate ;mechanically when the taps are opened and send a signal (live) to the pump telling it to run.

they have suggested you try other taps in the moho, if they work (after making sure you have power at the battery and other 12v 'mechanisms' work) then its more than likely a microswitch problem at the outlet you cant get to work, if they dont then its more likely to be a pressure operated system and the fault is with the pump,

replacing the pump is an easy enough job, as most fittings seem to be push fit ones nowadays - if you can get the same make/model of pump its a quick swap over as even the electrical connections are likely to be the same


take a photo first to check you re assemble it all together the same way

sorry for the janet and john answer but i hope it helps !!

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[Vipar]

Air blockages?

 

[two]

From the scant info provided, I'm assuming a pressurised system and the pump cannot be heard.
Could be one of several reasons why the pump is not running.

 

[berni109]

MH 55 FUN lots of suggestion so far I see. From what you said after my first post it sounds as if you have a pressurised system. Normal operation - switch on then the pump runs until correct pressure reached then switches off until pressure drops again (when u open a tap).
U mentioned the pump light flickering on the control panel- this could be caused by a loose connection somewhere- probably connections onto the pump or internally in the pump. If it's the latter is a new pump u need.
Always worth having a spare pump on board .

 

[Bognor Saint]

In September our pump packed up. Kept blowing fuses. Back to dealer for new pump under warranty. Now going to carry a spare with us.

 

[pappajohn]

I don't know, how do I tell please ?

If the taps have wires going to them they are micro switched..
Each tap can turn on the pump so to check if one tap switch has failed open, and keep open, the kitchen tap then open another tap in the shower/toilet.
If water flows from the kitchen tap then that microswitch has failed.
You can do this with any seperate taps.
BUT...... If the water light isn't showing its a wiring fault.

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[TheAleMan]

Air blockages?

That’s what I was going to say. I’ve experienced that a few times.

 

[MC 55 FUN]

If the taps have wires going to them they are micro switched..
Each tap can turn on the pump so to check if one tap switch has failed open, and keep open, the kitchen tap then open another tap in the shower/toilet.
If water flows from the kitchen tap then that microswitch has failed.
You can do this with any seperate taps.
BUT...... If the water light isn't showing its a wiring fault.

I don't know where to start, no water comes out of either the sink or bathroom tap or shower.
The pump normally makes a noise when it's on - not so now.
The green pump operating light is normally illuminated when the pump is on - now it just flickers when the pump switch is turned on.
The fuses are definitely ok.
I can't get to the base of the taps to see if they are wired.
The other 12v appliances work when ehu is disconnected.
The water tank is full.
The system has worked perfectly since Sunday morning.

 

[MC 55 FUN]

Try another tap (maybe you've already done so).

Do you have any kind of 12V tester?

When did the pump last work?

The pump last worked 10 minutes before i posted this plea for help, it's been working perfectly since Sunday morning.

 

[MC 55 FUN]

That’s what I was going to say. I’ve experienced that a few times.

How would I clear an air blockage please ?
Would an air blockage just occur after working perfectly since Sunday morning ?

 

[Robert Clark]

If you have a multimeter you can check the voltage at the pump itself
My suspicion is a dirty connection causing insufficient power for the pump, hence the flickering green indicator

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[pappajohn]

How would I clear an air blockage please ?
Would an air blockage just occur after working perfectly since Sunday morning ?

If the tank hasn't run dry then no, it won't just occur.
If none of the taps work it's not a microswitch fault.
My guess is the pump has failed.

 

[Lenny HB]

I think your van uses a whale pressure switch, it sounds like either the pump or the switch has failed. If you don't have a meter to check the electrics you could try shorting the two connections on the pressure switch. That will tell you if it is the switch, if it works it may just need the switch adjusting or the diaphragm may have gone in the switch.

 

[autorouter]

How would I clear an air blockage please ?
Would an air blockage just occur after working perfectly since Sunday morning ?

I think if it was an air blockage the pump would run, you would hear it running, but no water would come through the taps. If you can't hear the pump, assuming you know what it should sound like, then it's not an air blockage.

 

[MC 55 FUN]

If the tank hasn't run dry then no, it won't just occur.
If none of the taps work it's not a microswitch fault.
My guess is the pump has failed.

If you have a multimeter you can check the voltage at the pump itself
My suspicion is a dirty connection causing insufficient power for the pump, hence the flickering green indicator

I think your van uses a whale pressure switch, it sounds like either the pump or the switch has failed. If you don't have a meter to check the electrics you could try shorting the two connections on the pressure switch. That will tell you if it is the switch, if it works it may just need the switch adjusting or the diaphragm may have gone in the switch.

Thank you Robert, the issue is that Sharon's Cousin & his wife are isolating in the Moho & i really don't want to enter the Moho for obvious reasons.

I do have a multimeter.


Where would the pressure switch be please Lenny ?

 

[Lenny HB]

Where would the pressure switch be please Lenny ?

Often near the pump but not always, Richard and Ann any idea?

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