There could be a restriction in your cylinder, or if you have 2 motorised valves the hot water one may not be opening?
Are you able to put it on hot water only and see where the heat goes, follow it around the 3 port valve and see if it goes to the cylinder?
Hot water is going into the tank but boiler locked out water circulation.
Is the water coming out cold from the other side of the coil?
Are you able to turn the pump speed up?
The water going to the tank is hot pump is on speed 2
Can you turn it up to 3 and see if the boiler stays on longer and does not need resetting?
Will try now
Pump is on3 just started boiler going.
Still locks out with water circulation error
Have turned the thermostat down to half way and still locks out with water circulation error
Awaiting your answer
There is no blockage.
All valves are clear.
Yes getting circulation.