L3 fault - Ideal boiler

[Giles Mann]

Anyone have any ideas what this fault is? Will run the hot water for a little while and then boiler will lock out with L3 shown.

Can't even find this fault code in the boiler manual that I downloaded. Ideal independent C24.

Cheers

 

[sbgasman]

L3 is low water flow through DHW heatx .

 

[Giles Mann]

L3 is low water flow through DHW heatx .

Thanks sbgasman. Is this likely caused by limescale build up inside plate heat exchanger?

 

[sbgasman]

Yes it can be cleaned with brick acid/spirit of salts , be careful, search for cleaning DHW heat exchanger.