I found the fault - with help from Justanswer.com, although even the Volera engineer assisting did not actually propose the eventual fix!
It has a thermal cut-out on the MASTER OVERHEAT THERMAL SWITCH which is not automatically reset. When I pulled this from its mounting inside the burner...
The boiler was obtained from a local agent as a boxed "package" to replace an existing Vokera, allegedly as a direct replacement, same supply arrangements and pipe centres. Due to delays on other works in this flat refurbishment and other projects the box did not get opened for three years. At...
Hi
This is a new install and when DHW or heating is selected the pump starts but then the fan does not and hence there is no further action. I have tested the fan by feeding 240V direct to it. I also tested the PCB by using a link applied to appropriate IC pins to activate fan relay (relay...