Fd fault on Ideal Heat 15

[ShaunCorbs]

In my experience they don’t unblock so remove and reinstall a new one or repipe to standard full and vent etc

Both pump valves are open arnt they and tbh would leave x800 flowing for a week then you will require a drain down and refill and then drain down again to remove as much x800 as you can

 

[Sarah80]

In my experience they don’t unblock so remove and reinstall a new one or repipe to standard full and vent etc

Both pump valves are open arnt they and tbh would leave x800 flowing for a week then you will require a drain down and refill and then drain down again to remove as much x800 as you can

Yes the valves are open.
When we tap the pipe attached to the fernox filter the boiler will light and as soon as you stop tapping it goes out again. It’s had so much done to it now but seems as if it’s something so daft if it’s coming on when you tap the pipe.
Any experience of this?
The pipe goes up from the filter up into the airing cupboard and is connected to the air separator.