11
Maintaining your boiler
Greenstar FS CDi
ErP
– 6720818078 (2015/12)
5
Maintaining your boiler
Your new gas-fired boiler represents a long term investment in a reliable, high quality product.
To clean, wipe the boiler casing with a soft clean cloth. Please do not use chemical cleaning products which may damage the paint
finish.
In order to realise its maximum working life, and to ensure it continues to operate at peak efficiency and performance, it is essential
that your boiler receives regular annual servicing and maintenance checks during and beyond the guarantee period from a
competent registered gas engineer, such as a Worcester service engineer or other Gas Safe registered engineer.
If your Greenstar gas-fired boiler should fail to operate correctly or requires servicing, please contact the Worcester, Bosch Group
Appointments Team (see back cover for details).
Details of the boiler including the Gas Council number can be found on the front cover of these User Instructions and on the boiler
identification label on the boiler fascia.
The Gas Council number is also listed on the front cover of your Installation, Commissioning and Servicing Instructions.
6
Fault finding
In the event that the boiler stops functioning or does not perform as expected, you can carry out a few simple checks. The checks
listed in the table below detail some of the possible causes. Should the problem persist or if other fault codes are displayed, then it
will be necessary to contact the Worcester, Bosch Group.
This table gives information on basic operating system problems.
Problem
Cause
Remedy
EA fault code flashing
on display
No gas supply/low gas supply pressure
▶ Contact your gas supplier.
Condensate outlet blocked
▶ If it is safe to do so, check your condensate pipe
outlet for blockages, such as ice or foreign objects.
Flue blocked
▶ If it is safe to do so, check your flue outlet for
damage or blockages.
Desired room
temperature is not
reached
Thermostatic radiator valve(s) set too low
▶ Increase thermostatic radiator valve setting(s)
Temperature control for central heating flow on
boiler set too low
▶ Increase central heating flow temperature control
setting
Air trapped in heating system
▶ Bleed radiators and recharge heating system
Boiler temperature controls set too low
▶ Increase settings on boiler controls
Desired room
temperature too high
Radiators are too hot
▶ Turn down thermostatic radiator valves/room
thermostat
▶ Reduce central heating temperature by turning
down the Central Heating control on boiler
Heating stays on for
too long
Timer/Programmer incorrectly set
▶ Check setting and adjust
ON/OFF Indicator is
not illuminated
Momentary power failure
▶ Disconnect boiler supply, wait a few seconds then
reconnect.
Hot water
temperature too low
Cylinder thermostat temperature set too low
▶ Check setting and adjust
Air trapped in heating system
▶ Bleed radiators and recharge heating system
Timer/Programmer incorrectly set
▶ Check setting and adjust
Hot water
temperature too high
Cylinder thermostat temperature set too high
▶ Check setting and adjust
Table 1
Fault finding
