Is this shower mixer tap serviceable?

[Skylark NW]

This morning, the shower pump would not start when turning the flow valve, left side in the picture. Turning the temp control, right side in the picture, it started but only hot water. Turning the temp down, the shower pump stopped again. After a bit of rotary agitation, full cold, full hot etc, it now seems to be working again. Does anyone recognise this make/style of valve and can advise if it is serviceable (without removing tiles and so on to access the pipes at the rear)?

Many thanks.

 

[martygturner]

Its just a standard thermostatic shower mixer bar they are mostly a standard width between inlet water inlets, the two nuts against the round metal covers on the wall just unscrew to get the bar off.

The pump works by a flow switch, when it senses water flow it turns on...so either you had very low flow in the shower because the mixer valve is gummed up or the pump is going faulty.

 

[terryplumb]

Take the shower valve off the wall ,and check the inlet filters are clean ,not partially blocked.

 

[Skylark NW]

Its just a standard thermostatic shower mixer bar they are mostly a standard width between inlet water inlets, the two nuts against the round metal covers on the wall just unscrew to get the bar off.

The pump works by a flow switch, when it senses water flow it turns on...so either you had very low flow in the shower because the mixer valve is gummed up or the pump is going faulty.

Thank you.
Is there an easy way to determine if it's the valve or the pump?

 

[martygturner]

As terry said take the mixer off and clean it...if water runs through freely when then......

 

[Skylark NW]

Thanks again, @martygturner Same issue again this morning but this time several turns of the valve hot to cold hasn't succeeding in giving cold water flow. The pump is a Salamder. From experience, where should I start? I'll look for a (filter) blockage at the shower control valve and at the pump inlet, is one the more likely culprit than the other?

 

[oldbuffer]

Given the current cold weather, is it possible that the cold feed to the shower from the loft tank has frozen?

 

[martygturner]

Well the shower end is normally the blocked end...

 

[Skylark NW]

Given the current cold weather, is it possible that the cold feed to the shower from the loft tank has frozen?

Good call! I've lived here for 35 years, urban south Manchester, and never experienced a frozen pipe before. This cold snap has been prolonged and bitter. All working fine again now that the mercury has risen.