Recent content by g6mk

When I open a tap in DHW mode, the pushrod of the diverter is "pushed in" ie normal and the voltage at the DHW Flow switch terminals is 5V.

I check the voltages at the PCB level where the colours are visible. The motor is working fine when tested with an external supply. Now the situation is reversed, there is central heating but no DHW. Here is what I have observed. Two days ago, with the selector knob in either DHW or DHW/CH...

The latest update is that now CH started working while DHW does not. The live connection to the diverter motor is now brown and does not switch to black irrespective of whether there is DHW demand when in CH/DHW or DHW mode.

When the selector is in the middle, the display goes out as normal.

My vokera linea 28 has only been giving hot water in the last few days. It seems "stuck" in DHW mode unless it gets turned off. The diverter valve moves freely and taking the motor off gives CH as expected. The problem seems to be that the motor pin is always in the out position. Checking...