Paragraph 3
The warranty is not required to provide for the rectification of a problem which—
(a)
is covered by a warranty provided by the manufacturer of the replacement boiler; or
(b)
arises after the replacement boiler is installed where that problem arises from one or more of—
(i)
negligence;
(ii)
accident;
(iii)
misuse of the replacement boiler;
(iv)
repair of the replacement boiler,
by a person other than a person described in paragraph 4.