Lack of Hot Water pressure in Taps

[Jason L]

Hi little helpers.

I have the Vokera compact 24 (installed July last year).
Within the past month the hot water pressure has dropped to a meagre trickle.

Approx time of filling the bath halfway is around 30minutes.

The cold water pressure is fine on all taps but the hot is as above on all taps.

Boiler is on the ground floor and the bath is on the next floor above.

What can I do before I call a plumber, which may diagnose exactly what the problem is.

 

[gowdon]

on the compacts there is a flow restrictor on the inlet to the heat exchanger,i have a few cases where it gets restricted wirh debris slowing down the outlet flow to your hot taps