How to test any combi DIVERTER in 60 seconds, the easy way. 23 09

It’s all in the yellow book, flow charts 9 to 11 and pages 46 to 57 and how to fix. Central Heating Fault Finding Book Don’t waste time guessing or phone a friend, this book has 90% of every popular fault known, with easy flow charts. Don’t go to any boiler without this book, no manual no problem, worked for me for over 45 years Central Heating Wiring & Controls Book 3 The most common control circuits in use in the UK are the three port (Mid Position) and 2 and 3 port zone circuits. For many years electricians and heating engineers have commented that wiring heating controls is a difficult subject to learn, (this book is easy to follow) with APPs to download Just order both books + CO2 chart, order value £40.00 incl. P&P no vat (normally £54.00) UK Post Code only For more info: please use the link below Our APPs are all one price £4.99 no vat https://www.mrcombi.com/apps/ Apple iOS download: https://apps.apple.com/gb/developer/m... Google Play download: https://play.google.com/store/search?... BOOKS: https://www.mrcombi.com/shop/ YouTube Videos:    / @mrcombibedford