Water tank is full but gauge shows empty

We filled the water tank to overflowing and now the gauge is not registering any water, but there is no evidence of a leak. But worse the pump is working (can hear it trying) but is not making any water come out. tried sucking but it's next to impossible! We are away from home, and due to get the tunnel to France tomorrow evening. 
Please does anyone have any suggestions how we can get the water running again?
Thank you, Penny.

Hi there,

If it's like mine then there is a little button and a knurled knob.

You fill the tank. Press button and turn the knob to adjust the scale to show 100%.

The scale then drops down as the water is used and to check the scale you push the button.

Hope this helps. 

Best regards,
 

And if it's like mine it doesn't have a "knurled knob"! Simply a push switch to show battery condition/water level, but the water level is frequently unreliable and has shown empty in the past when I knew damn well it was full (possibly due to a faulty float sensor or the float itself sticking).

As for the OP's problem....at best it could just simply be an air lock, at worst the pumps knackered in which case it's going to need coming out and possibly replacing.

As you are leaving UK today that's really cutting it fine. But there is an excellent Caravan Spares dealer just outside Bray Dune who may be able to help. If any use to you I have the co-ordinates but they are in my van and i'm away from it atm.

Quick "PS"

We have NEVER used the level indicator!!  

When the water supply starts "spitting" we are running out of water and it is time to fill up!  

Best regards,
 

The pump will run with an air lock, open the kitchen tap and while sucking the outlet, between sucks
seal  outlet with tongue, suck again, tongue, suck, repeat,  until water comes through.
If no pressure from pump at this point, pump is failing. When my pump failed though it was
leaking from upper casing. good luck !

 Hello you lovely helpful people,
Thanks very much to lovely Steve of Mobile Motorhome and Caravan Services in Westgate near Broadstairs who gave up his day off to sort us out on a Sunday. As Bulletguy suggested, it was a knackered pump which needed replacing and now all is working fine. The gauge is a bit dodgy as the control panel is a bit old and tired, but twiddling the knurled knob worked (!), and I didn't fancy the suck and tongue experience! 
Thanks again for your suggestions. We're now on our way to the tunnel with a fully functioning Bertie.
Penny.

Hi there,

Please accept my apologies for answering the wrong question!!  

Close all the taps.

Open the cold tap on the sink.

Switch the pump on.

Suck air from the tap until you hear the pump change tone (or start choking)! If water doesn't appear repeat the sucking until it does.

Let the water run until it stops "spitting" and close the tap. The pump should now stop. (If it doesn't stop get back to us.)

Now open all the other taps in turn until the water flows freely and then close them off; then check that the pump stops on each occasion. (The hot water system has an expansion tank fitted so the pump will run for a few seconds after closing a hot water tap.)

Hope this helps. 

Best regards,
 
Ian

Hi there,

Our posts overlapped - sorry.

Enjoy the new pump but when you next run the water tank empty you can refer back to my post!!  

Best regards,