Logic combi 24 showing fault L3! Help needed!

20 Feb 2021
Reaction score
United Kingdom
If anyone can help or advise me what to do , I’ve a Logic combi boiler 24 showing fault L3 . No heating or hot water . It has been dripping small amounts of water I would think for several months from underneath - which I’ve stupidly ignored .
My question is will this be a simple repair job , I think it’s the heat exchanger that is needing attention or possibly replacing. Or is it going to be a new boiler . The existing boiler is about 10 years old . Funds are an issue due to Covid so any advice would be very much appreciated
Thank you for reading
Sponsored Links
I'm afraid you will need to get someone out as I think L3 is no flow detected (IIRC), hopefully it will be a simple repair for you.
Sponsored Links

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local