Worcester GB162 Series - A Fault Has Occurred but no Fault Code Is Displayed

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Commercial Boiler Series – 6720814333 (2019/05)
If the fault code still persists contact your installer, stating the appliance
type and fault code. Alternatively please contact Worcester Technical
Support (contact details on the back cover of this guide).
Table 6 Operating and fault codes
7.2 A fault has occurred but no fault code is displayed
It is possible that even though a fault code is not displayed the boiler
does not operate according to your expectations. You should then check
the following:
Heating system does not heat up
▶ Check in the information menu whether a fault code is displayed and
try to remedy the fault.
▶ Check the set boiler temperature in the setup menu.
▶ Check the settings of the heating controller by referring to its manual.
If the fault code still persists contact your installer.
▶ Note the fault code.
▶ State the appliance type and serial number. These are listed on the
right-hand side of the boiler.
Code Explanation Corrective measure
     The boiler is in heating
mode.
     The boiler is in DHW
mode.
     The boiler cannot
transfer the heat to the
heating system.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators/
heating system.
• Reset the boiler.
     The boiler is in standby
mode, there is no heat
demand.
     The boiler cannot
transfer the heat to the
heating system.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The boiler is waiting.
The boiler duly switches
on in order to satisfy the
heat demand.
     The boiler starts.
    
    
     The water pressure is
too low.
• Check the water pressure
of the boiler and top up if
necessary.
• Reset the boiler.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check the water pressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The temperature
measured by a
thermostat in the boiler
is too high.
• Check the water pressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     No burner ignition. • Check that the gas
isolator is open.
• Reset the boiler.
     The temperature
measured by the
sensors in the boiler is
too high.
• Check the water pressure
of the boiler and top up if
necessary.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
    
     The sensors inside the
boiler detected
unexpected
temperatures.
• Check whether a
sufficient number of
radiator valves are open.
• Bleed radiators and vent
heating system.
• Reset the boiler.
     The power was briefly
interrupted during a
fault.
• Reset the boiler.
   The water pressure is
too low.
• Check the water pressure
of the boiler and top up if
necessary.
  The boiler is reset.
Code Explanation Corrective measure