Worcester Greenstar Highflow 440 User Boiler Fault Codes

Problem	Cause	Remedy
Desired room temperature is not reached	Thermostatic radiator valve(s) set too low Temperature control for CH flow on boiler set too low Air trapped in heating system	Increase thermostatic radiator valve setting(s) Increase CH flow temperature control setting Bleed radiators and recharge heating system
Desired room temperature exceeded by large amount	Radiators are too hot	Turn down thermostatic radiator valves / room stat
Temperature rises instead of falling	Clock is incorrectly set	Check setting
No display or display unit does not respond	Momentary power failure	Switch off appliance at master switch, wait a few seconds then switch on again
Hot water temperature too low	Hot water temperature dial set too low	Check setting