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Worcester-Bosch Greenstar Danesmoor External Regular - External System Manual

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Fault finding
Greenstar Danesmoor External 2022+ & External System 2022+ – 6 721 844 015 (2022/01)
7Fault finding
In the event that the appliance stops functioning or does not perform as expected, you can carry out a few simple checks. These
checks are some of the most common causes and are listed in the table below. Should the problem persist, then it will be necessary
to contact Worcester, Bosch Group.
Problem Cause Remedy
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
Low temperature setting on the room thermostat ▶ Increase settings on room thermostat
Air trapped in heating system (System model) ▶ Bleed radiators and re-pressurise the heating
system
Low system water pressure (System model) ▶ Re-pressurise the system, refer to page 8
Desired room
temperature is too
high
Thermostatic radiator valve(s) are set too high ▶ Turn down thermostatic radiator valves/room
thermostat
Room thermostat is set too high ▶ Reduce the thermostat setting
▶ Reduce central heating temperature by turning
down the Central Heating control on boiler
Heating stays on for
too long
Clock is incorrectly set ▶ Check setting and adjust
Hot water
temperature too low
Temperature set too low on cylinder thermostat
control.
▶ Check setting and adjust
Air trapped in heating system (System model) ▶ Bleed radiators and re-pressurise the heating
system
Low system water pressure (System model) ▶ Re-pressurise the system, refer to page 8
Hot water
temperature too high
Temperature set too high on cylinder thermostat
control.
▶ Check setting and adjust
System pressure low Leak within the heating system ▶ Check system for obvious leaks.
Table 2 Fault finding
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