Before any work is done on any boiler you should do this 4 Part test. Our yellow (easy to follow) FAULTS book and APP has this and a lots lots more information to solve this and most other problems.
Our “Special Offer” is order both books, order value £40.00 include. P&P no vat UK Post Code only.

Order the books & CO2 chart from
[ Ссылка ]
Our APPs are all one price £4.99 no vat
Apple iOS download: [ Ссылка ]...
Google Play download: [ Ссылка ]?...
BOOKS: [ Ссылка ]

свернуть