No water coming out of Mira Jump electric shower

dharm999

As title says, half way through a shower the water just stopped coming out.  Water supply is fine, have checked hose and shower head and no problems with them.  When I put on the power for the shower via the cord, it makes no noise at all, so doesn’t appear to be drawing in any water.  Have read online that it could be the solenoid valve or cable, would that make sense, and are they easy to change?  Or should I just buy a new shower as it wouldn’t be economic to repair?  The shower is around 5 years old

Thanks

ThisIsWeird

Lots of possible reasons. 
In general, Mira showers are easy to work on, but you do need to be competent around leccy and water, in particular when they mix.
So, it's power off, obvs, at the CU as well as the isolating switch.
Confirm, please:
The neon light on the isolating switch does come on when you pull the cord/flick the switch?
Does the neon on the actual shower come on at all?
Does the neon on the isolating switch flicker at all?

dharm999

ThisIsWeird said:

Lots of possible reasons. 
In general, Mira showers are easy to work on, but you do need to be competent around leccy and water, in particular when they mix.
So, it's power off, obvs, at the CU as well as the isolating switch.
Confirm, please:
The neon light on the isolating switch does come on when you pull the cord/flick the switch?
Does the neon on the actual shower come on at all?
Does the neon on the isolating switch flicker at all?

Yes, the light comes on, on the isolating switch

Yes, the neon light on the shower comes on

No, the neon light on the isolating switch doesn’t flicker

ThisIsWeird

If the isolating switch light remains constant, and the Jump's own indicator light comes on, that suggests it ain't anything to do with the power supply.

It is extremely unlikely that the water supply to the shower has somehow been interrupted - I cannot think of any way that this could have occurred in an instant, during a shower. However, it's important to be able to discount the easy, so - with power off at the CU, and the water supply also off, the first thing to do is remove the inlet filter. Then get someone to slowly turn the water back on - scream when it comes coursing through.

On that note - does your shower have a water isolating valve?

Then it's checking the obvious electrical components using a multimeter. I don't know if a failed - open - thermal 'stat would prevent the shower from letting in water, but these should be tested in any case. Also the solenoid coil for being 'open' circuit.

You only do this if you know what you are doing.

dharm999

Checked again this morning, and the isolating switch is flickering and not on constantly, does that suggest an electrical problem?  The neon light on the shower is a solid green, no flicker.

Ectophile

The little neon lamps do tend to flicker as they get old.  It doesn't really tell you anything.

You mentioned the pull cord, but not the power button on the front of the shower.  It isn't just turned off, is it?

dharm999

Ectophile said:

The little neon lamps do tend to flicker as they get old.  It doesn't really tell you anything.

You mentioned the pull cord, but not the power button on the front of the shower.  It isn't just turned off, is it?

Power button comes on, no problems, solid green neon light.  The shower stopped working halfway through me having a shower.

ThisIsWeird

Ectophile said:

The little neon lamps do tend to flicker as they get old.  It doesn't really tell you anything.

You mentioned the pull cord, but not the power button on the front of the shower.  It isn't just turned off, is it?

Does it flicker all the time it is on, or just when you also try and use the shower?
As Ecto says, neons do tend to have a constant wee flicker like a vibration, but I'm really asking about something more obvious - a more random and severe on/off-ish flickering, and only when the shower is turned on.
The power light on the shower - is that always meant to be on when the shower is receiving power, or does it only come on when you press the power button on the front? And, when you press that shower power button, does the red neon change at all?

If, when you try and use an electric shower, the isolating switch neon flickers dramatically, or goes off, then that suggests a poor connection inside that isolating switch. But it has to be a very obvious FLICKER and not just 'background', and also only happen when the shower itself it turned on.

dharm999

ThisIsWeird said:

Ectophile said:

The little neon lamps do tend to flicker as they get old.  It doesn't really tell you anything.

You mentioned the pull cord, but not the power button on the front of the shower.  It isn't just turned off, is it?

Does it flicker all the time it is on, or just when you also try and use the shower?
As Ecto says, neons do tend to have a constant wee flicker like a vibration, but I'm really asking about something more obvious - a more random and severe on/off-ish flickering, and only when the shower is turned on.
The power light on the shower - is that always meant to be on when the shower is receiving power, or does it only come on when you press the power button on the front? And, when you press that shower power button, does the red neon change at all?

If, when you try and use an electric shower, the isolating switch neon flickers dramatically, or goes off, then that suggests a poor connection inside that isolating switch. But it has to be a very obvious FLICKER and not just 'background', and also only happen when the shower itself it turned on.

It flickers all the time.  The power light on the shower itself only comes on when I press the power button on the shower and the flicker on the red neon light on the isolating cord doesn’t change.

ThisIsWeird

dharm999 said:

ThisIsWeird said:

Ectophile said:

The little neon lamps do tend to flicker as they get old.  It doesn't really tell you anything.

You mentioned the pull cord, but not the power button on the front of the shower.  It isn't just turned off, is it?

Does it flicker all the time it is on, or just when you also try and use the shower?
As Ecto says, neons do tend to have a constant wee flicker like a vibration, but I'm really asking about something more obvious - a more random and severe on/off-ish flickering, and only when the shower is turned on.
The power light on the shower - is that always meant to be on when the shower is receiving power, or does it only come on when you press the power button on the front? And, when you press that shower power button, does the red neon change at all?

If, when you try and use an electric shower, the isolating switch neon flickers dramatically, or goes off, then that suggests a poor connection inside that isolating switch. But it has to be a very obvious FLICKER and not just 'background', and also only happen when the shower itself it turned on.

It flickers all the time.  The power light on the shower itself only comes on when I press the power button on the shower and the flicker on the red neon light on the isolating cord doesn’t change.

Ok, so most likely as Ecto suggested - it's the natural flicker from an ageing neon.

No magic solution - you just need to look at an exploded diagram, and check each component one at a time. And you obviously only do this fully taking into account water and electricity.

I guess checking the inlet filter is an obvious first step, and should be done to discount it. POWER OFFSKI.

Vortigern

With the power off, check the security and condition of the terminals within the isolator switch. I found burned/pitted contacts, melted plastic insulation. The switch contacts had been arcing. Replacing the isolator fixed the problem. Pitted contacts might pass sufficient power to light the neon, but not operate the shower.