Mini c28 boiler - intermittent ch

[Xenicus]

Hi everyone,

We have a mini c28. Hot water is fine. However central heating seems to go on and off.

It fires up for 20-30 seconds then goes off. Does this every few minutes. However eventually it will come on and stay on. Usually in the evenings.

Can anyone suggest what the issue could be please?

 

[Agile]

I would need a lot more information on your system.

Also to know what the flow temp is reading when it goes off !

If it only has one diagnostic light then putting it into permanent diagnostic mode and drilling two 2 mm diameter holes in the front panel so you can see them would also help.

Search for my explanations on this forum but under Biasi M90 as that's the makers own brand model.

Tony

 

[Xenicus]

Hi Tony

The temperature dial doesn't seem to move. I'm sure it used to so that maybe indicates something is up.

Just one diagnostic light. Flashing on off very rapidly, multiple times a second.

Will search. Thanks.

 

[Agile]

If gauge at zero then its probably faulty.

Tony