My central heating works fine on the boiler, but the domestic hot water (DHW) does not, barely gets above 30 centigrade with the fan and burner on with the thero at maximum temperature. When the thermo is turned to the minimum setting in DHW mode the burner stays on, but no change in water temp is seen.
Anyone know the problem?

Gammysenior, February 2010

Shower goes cold after 3-4 mins

john, January 2012

Had a similar problem this week with mine. Engineer found that the dial shaft that sets the temp for the HW had broken off inside - apparently a common probelm. He unscrewed the pcb, carefully lifted it up and exposed a smaller pcb that housed the temp dial - turned it to just below max manually with a small screwdriver and now good temp. I still have another problem with mine though with the ignition - on, off, on, off every 4 seconds arhhh!- hope you get yours sorted.

Simon, February 2011

showing 02 code on display hot water ok but ch not

anwar, June 2010

You will probably find that your radiators are hot when running the hot water, even though the central heating thermostat is off. It sounds like a diverter valve problem where the hot water is being diverted into the central heating system. Vokera do not sell the whole valve, only parts of the valve, so a vlave repair kit and a overhaul of the valve should fix the problem. Around £100 to fix.

Boilerman, February 2010

under the boiler there is a black lever (on right hand side) it will be sitting at 12 oclock. with the water running, stat at maximum after 5 mins turn lever anti-clockwise to 9 oclock and it temperature reads over 80 degrees the domestic heat exchanger is faulty..

fitter, February 2010