Ariston microCombi Servicing Instructions page 20

IS THE FAN
RUNNING?
YES
20
Supplied By www.heating spares.co Tel. 0161 620 6677
NO
BOILER
SHUTDOWN?
NO
INTERNAL
P.C.B. PROTECTIONS
ACTIVATED?
NO
POWER
TO FAN?
YES
1 - Replace fan
YES 1 - Reset the boiler
1 - Check/replace air
pressure switch
YES
2 - Check if reset button
is jammed
3 - Check/replace flame
detection electrode
1 - Check/replace
connection cable
2 - Check/replace P.C.B.
NO
3 - Check air pressure
switch is not stuck
the N.O. position