Hi
I have a Vokera Compact HE 25 which is exhibiting a strange issue in that when it fires up which it does quite readily, its flame goes on and its on for perhaps 2-3 seconds then goes off again for 2-3 seconds, then fires again, repeat endlessly. All the time the green light is flashing 0.5secs on/off so it doesn't go into lock out/red light at all.
After perhaps 10mins of this when CH called for, it seems to work better and stay fired up for longer periods and the CH does get hot and if I call for HW when its like this WH is fine and hot, if I call for HW when the boiler isn't performing CH duties and constant burn, all I get is luke warm water.
I've replaced the 2 thermistors to no avail (the old ones tested ok on multimeter), drained the system, added cleaning agent for a few days, then drained again and refilled including inhibitor although I'm confident I don't have any blockages or sludge as the drained water from the initial draining was crystal clear and bleeding radiators also only give clear water (no rust/sludge etc).
The last thing I've tried is a 'new' Ignition Module but fitting this results in the boiler failing to fire and locking out totally. The seller said this was due to the gas needing recalibrating for a new PCB but I'm not sure I believe that as solid state PCB's should give consistent voltages/timings etc and suspect I've been sold one pulled from an old system and possibly more faulty then perhaps my current ignition board is (if it is this board).
I have BG coming monday as I know I'm limited on what I can do to try fix (limited to electrical side/component swap outs.....staying clear of direct gas components) but has anyone ever seem this sort of thing before on a Vokera as its difficult timing showers/washing up when the water runs luke warm unless the CH has been on and heating for 10mins or so when the boiler then seems to function normally?
I have a Vokera Compact HE 25 which is exhibiting a strange issue in that when it fires up which it does quite readily, its flame goes on and its on for perhaps 2-3 seconds then goes off again for 2-3 seconds, then fires again, repeat endlessly. All the time the green light is flashing 0.5secs on/off so it doesn't go into lock out/red light at all.
After perhaps 10mins of this when CH called for, it seems to work better and stay fired up for longer periods and the CH does get hot and if I call for HW when its like this WH is fine and hot, if I call for HW when the boiler isn't performing CH duties and constant burn, all I get is luke warm water.
I've replaced the 2 thermistors to no avail (the old ones tested ok on multimeter), drained the system, added cleaning agent for a few days, then drained again and refilled including inhibitor although I'm confident I don't have any blockages or sludge as the drained water from the initial draining was crystal clear and bleeding radiators also only give clear water (no rust/sludge etc).
The last thing I've tried is a 'new' Ignition Module but fitting this results in the boiler failing to fire and locking out totally. The seller said this was due to the gas needing recalibrating for a new PCB but I'm not sure I believe that as solid state PCB's should give consistent voltages/timings etc and suspect I've been sold one pulled from an old system and possibly more faulty then perhaps my current ignition board is (if it is this board).
I have BG coming monday as I know I'm limited on what I can do to try fix (limited to electrical side/component swap outs.....staying clear of direct gas components) but has anyone ever seem this sort of thing before on a Vokera as its difficult timing showers/washing up when the water runs luke warm unless the CH has been on and heating for 10mins or so when the boiler then seems to function normally?