DIY Doctor UK DIY Forums

Hello there,

i currently have a cold water tank in the loft which is connected to to single shower pump which feeds water to a electric shower in the bathroom directly below.

the problem im experiencing; the pump seems to be pulsating on and off very quickly, ive switched the pump of by the fuse and then tried to power the shower and i do get running water (obviously without the force) but it remains cold (should be hot).

is the problem with the shower pump or the shower, or both?

does anyone by any chance know how much a repair centre should charge for a pump fault check?

thank you all.

stuart turner showermate 1.5 bar single,

The crucial bit of information missing of course is the pump model but the most likely cause is a faulty flow sensor. Of course the pipe could be leaking triggering the pump.

Does the shower show a low pressure warning when used without the pump as this would explain the cold flow.

plumbbob wrote:The crucial bit of information missing of course is the pump model but the most likely cause is a faulty flow sensor. Of course the pipe could be leaking triggering the pump.

Does the shower show a low pressure warning when used without the pump as this would explain the cold flow.

Hi, its a small stuart turner showermate 1.5 bar single,

i have a system were the pump engages as soon as i flick the switch for the shower, so its not a case of flipping 2 different switches.

yes it does show a low pressure warning (without the pump) but still shouldnt the water be coming out hot?

thanks for the help, much appreciated

The only thing that can cause "hunting" is the flow sensor but if you say your pump doesn't have one then I cannot imagine what the fault may be.

You don't have a combi boiler or other pressurised hot water system by any chance do you?

An airlock or clogged filter could fool a flow sensor into switching the pump on and off.

m27try wrote:yes it does show a low pressure warning (without the pump) but still shouldnt the water be coming out hot?

No. The heating elements automatically turn off in the event of low pressure as a safety precaution against accidental scalding.

plumbbob wrote:The only thing that can cause "hunting" is the flow sensor but if you say your pump doesn't have one then I cannot imagine what the fault may be.

You don't have a combi boiler or other pressurised hot water system by any chance do you?

An airlock or clogged filter could fool a flow sensor into switching the pump on and off.

m27try wrote:yes it does show a low pressure warning (without the pump) but still shouldnt the water be coming out hot?

No. The heating elements automatically turn off in the event of low pressure as a safety precaution against accidental scalding.

Hello,

it was a shower fault, having explained to Argos what was happening, they agreed to send out vouchers as i did buy thier extended guarantee plan upon purchasing.

just fitted the new shower and the problem has gone, thanks for the advice!