Worcester 18/25 User Manual download pdf (Page 9)

FAULT FINDING

Problem Cause Remedy

Check setting of cylinder

thermostat then boiler

temperature control

setting

Check programmer

timings

Desired room temperature

is not reached

Thermostatic radiator

valve(s) set too low

Room thermostat set too Increase room thermostat

low setting

Temperature control on

boiler set too low

Air trapped in heating

system

Desired room temperature

exceeded by large amount

Temperature rises instead

of falling

Hot water temperature too

low

Radiators are too hot

Clock is incorrectly set

Hot water temperature set

too low

Tank cold

Increase thermostatic

radiator valve setting(s)

Increase temperature

control setting

Bleed radiators and

recharge heating system

Turn down thermostatic

radiator valves / room

thermostat / boiler

temperature control setting

Check setting

FAULT FINDING

GREENSTAR UTILITY 18/25

8 716 106 257b (03.2010)

7

USING YOUR

BOILER

8 716 106 257b 30/3/10 14:26 Page 9

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