Technical data

Unblock filter or
incoming gas pipe.
Purge out before
reconnecting to boiler.
YES
Tighten Fan
connections.
YES
Replace Fan
connection seal.
YES
Tighten Burner
connections.
YES
Fit new Burner Seal.
YES
15.0 Fault Finding
54
YES
Is the
noise coming from the
burner ?
Replace Burner.
Is the Burner damaged ?
NO
YES
Burner or Heat Exchanger Noisy
Is the
Burner Seal missing or
damaged ?
Is the
Burner loose ?
Is the
Fan connection seal
damaged ?
Is the
Fan loose ?
Are Gas feed
pipe O rings
damaged ?
Is
Gas Valve inlet
filter or incoming gas pipe
partially blocked ?
Smear new O rings with
silicon grease before
fitting and ensure
positive location in Gas
Valve/Venturi.
Change Gas Valve and
Venturi.
NO
NO
NO
NO
YES
NO
NO
Recharge Expansion
Vessel to correct
pressure (1 bar
nominal).
YES
YES
Is the
noise coming from the
heat exchanger ?
Ensure that there is no
air in the heat
exchanger or system.
Is the
Heat Exchanger still
noisy ?
NO
Is the
Expansion Vessel
charged (1 bar nominal) ?
Add extra inhibitor to
system.
Flush out system, add
inhibitor again and
ensure all air removed.
YES
YES
YES