Water pump not working

Afternoon all.
Just been to van to check over. The water system has been drained throughout the cold times as it has always been done. I filled the water tanks just to check systems and closed all taps, that I leave open when laid up,  switched on the pump on the control panel opened the cold water tap to sinks and nothing happened. The handbook mentions number 4 fuse and the pressure switch as being possible causes. Has anyone changed this pressure switch? On the net there is mention of a Surflo replacement pump. Any thoughts please.

What year is your Sussex Duo? My 2010 doesn't have a submersible pump and therefore doesn't have a pressure switch to adjust as its built into the Flojet pump (similar to Shurflo). I wasn't aware that some Sussex Duos had submersible pumps.
When you switched on the pump could you hear the hot tank filling? When I'm filling tank I turn pump on and open taps so air is pushed out as the hot tank fills, eventually after hot tank is full the taps will flow.

Thanks.
It's a 2011 model  and the pump is not a submersible unit. I have actually heard absolutely nothing. Filled water tanks, closed tap to kitchen area and tap in toilet area and pressed tap switch on control panel by the side door, opened both taps and nothing. Tried one tap at a time and still nothing. Checked fuse 4 no problem. My wife will have to come out tomorrow to see if I have missed something but i don't think so.

Give pump a sharp tap , if still nothing then sounds as if pump kaput.

If flojet pump then pressure switch is the small black square unit on the end. The cost of that part is almost as much as a complete pump, mine was playing up so I got a complete one off ebay . Its a really easy swop as connectors are simply pull off.

Thanks a lot. It sounds like the hammer and then shopping time.

If P. Mold's there I was wondering what your thoughts are.
Flojet have recommended the R3426 504A unit as a replacement but it is 30 psi. I am assured that this will not be a problem. It is available at around £60 which seems reasonable as the 20 psi Shurflo unit from AS is £113 + vat.
One thing that I did note during my 'research' is that, I think, the Flojet user manual suggests disconnecting the water pipes to the unit during winter, not just emptying the heater and tanks and running the pump for a while, which is what I have always done.
Decisions decisions. Thanks again.

I replaced mine with a R3426 500A which is 25psi which was same as originally fitted. I've never disconnected the water pipes just done same as you.
30psi probably won't cause a problem but there is a max pressure for the truma combi, can't remember what that is but worth checking.

I replaced mine as it got to the point of having to kick the panel the pump is fastened to to make the pump start.  When I took it off, I opened up the pressure switch and found muck in there which may have been the cause of the problem. Before you buy, have a look in the pressure switch.

Thanks. Will do. A bit of gardening to do first. The sun is shining.

pootler wrote:If P. Mold's there I was wondering what your thoughts are.
Flojet have recommended the R3426 504A unit as a replacement but it is 30 psi. I am assured that this will not be a problem. It is available at around £60 which seems reasonable as the 20 psi Shurflo unit from AS is £113 + vat.
One thing that I did note during my 'research' is that, I think, the Flojet user manual suggests disconnecting the water pipes to the unit during winter, not just emptying the heater and tanks and running the pump for a while, which is what I have always done.
Decisions decisions. Thanks again.

Shurflo trial king 20 psi £55 Halfords web search

Had the 20psi in Duo for 4+ years, never missed a beat. 

Richard

Changing a Flojet to a Shurflo involves different connectors and maybe altering pipework. Sticking with a Flojet is so simple to swop.

The flojet company recommended the R3426 504A which is 30 psi. I wasn't convinced so I took the pump out disconnecting the pipe work first. By opening the pressure valve I was able to join together the electrical leads going to the switch and then  switching the pump on at the control I confirmed that the pump itself was Ok. I sourced a replacement Flojet 25 psi pressure switch and after a bit of patience replaced the old switch and put the pump back in place. Things then worked correctly. Phew.The switch was about half the price of a new pump but I couldn't find a pump that I was happy with. I may still try and find a new complete pump just in case. Still all's well at the moment. Thanks for the help.

We’ve used Shurflo 20PSI, 7litre/min pumps in our vans for the past 12 years and they’ve performed faultlessly. Just ordered one for our next van, as I’m not relying on the Whale submersible pump it’s fitted with. 

As Richard said above, £55 from Halfords - I joined their motoring club for free and got a £5 voucher to bring it down to £50.

Tim

Kemerton-bath wrote:We’ve used Shurflo 20PSI, 7litre/min pumps in our vans for the past 12 years and they’ve performed faultlessly. Just ordered one for our next van, as I’m not relying on the Whale submersible pump it’s fitted with. 

As Richard said above, £55 from Halfords - I joined their motoring club for free and got a £5 voucher to bring it down to £50.

Tim

All the best with your new purchase, hope all goes to plan
Richard

Hi ,just  fit a Shurflo lowest pressure, and forget all pump problems!!!  Regards    Paul B

rgermainAll the best with your new purchase, hope all goes to plan wrote:Richard

Thanks Richard, doubtless there will be issues and questions for me to pose on here once we’ve got it!

Tim