Heating and controls installers take these 2 books with you.

Heating faults can be a nightmare to find we can’t remember all the answers or sequence, the yellow “Fault Finding" Book or APP is for YOU made easy
Most of the error codes are in the F.22 app, the book has charts and lists to find the fault sooner and stress free.
The orange "Wiring Controls" Book has most of the popular drawings in COLOUR very easy to follow and find the fault.
Mid Poz. Y Plan 2 Zone S Plan 3 Zone Nest Hive Baxi Drayton Honeywell Home Vaillant Worcester drawings on COLOUR
On new installations ALWAYS use a wiring centre NEVER a 10 way box, make life much easier.
New or lack confidence what ever your level these 2 books can help
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For more info: please use the link below
Our APPs are all one price £4.99 no vat
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Music: All the Fixings. Zachariah Hickman