Hot water problem - Worcester 35CDi

[Wingtsang]

Hi all,

I recently had a problem with my boiler. The CH works fine and the boiler fires up without no problem when CH is requested. The problem lies with when I need hot water.

When I turn on a hot water tap, the boiler ignites for like 10-15 secs and then slowly dies off. It then repeats this process another couple of times and then finally the hot water light starts flashing and the boiler doesn't light up again.

The bar is around 2 after I repressured it from around 0.3.

Any ideas?

Thanks for any help

 

[ollski]

I think from memory this is the one with the black and yellow flow switch in front of you when you take the front of, if so suspect that.

 

[Wingtsang]

So I would need to replace this switch? Is it expensive and can I do it myself or do I need an engineer?

Sorry if I sound stupid but I am a complete DIY noob