Fault Finding - Worcester Greenstar Highflow 440CDi User Instructions & Customer Care Manual

FAULT FINDING

This table gives information on basic operating system problems.
In the unlikely event of a boiler fault please read the following page thoroughly before contacting
Worcester, Bosch Group.
PROBLEM
Desired room
temperature is not
reached
Desired room
temperature exceeded by
large amount
Heating stays on for too
long
No on/off indicator
Hot water temperature
too low
Hot water temperature
too high
12
FAULT FINDING
Supplied By www.heating spares.co Tel. 0161 620 6677
CAUSE
Thermostatic radiator Increase thermostatic radiator
valve(s) set too low valve setting(s)
Temperature control for CH
Increase CH flow temperature
control setting
flow on boiler set too low
Air trapped in heating Bleed radiators and recharge
system heating system
Radiators are too hot Turn down thermostatic radiator
valves / room thermostat Reduce
central heating temperature on
boiler
Clock is incorrectly set Check setting
Momentary power failure Switch off boiler at master switch,
wait a few seconds then switch
on again
Temperature set too low Check setting
Programmer setting Check setting
Water flow at tap too high Reduce flow rate at tap
Temperature set too high Check setting
USER INSTRUCTIONS & CUSTOMER CARE GUIDE
8 716 115 220a (07.2008)
REMEDY