Main Boiler Error Codes

Main Boiler Error Codes

Main Error Codes
The Main range of powerful boilers are normally extremely reliable.

Occasionally some things can go wrong, that’s why we’ve created our handy at-a-glance table of Main error codes below and guide to Common Main Boiler Problems and Repair Advice.

Should you need professional help with your broken boiler, then simply use one of our enquiry forms and we will connect you with the best heating engineers local to you.


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Main Boiler Error Codes

Listed below are some error codes that could appear on your Main boiler.

Fault Code System Behaviour
E168 Error code E168 could mean that your boiler has detected a problem but can’t work out exactly what it is;
E20 “Central Heating NTC Fault indicate faulty components. You
should make a note of the displayed error code “
E28 “PCB Fault indicate faulty components. You
should make a note of the displayed error code “
E50 “Hot Water NTC Fault indicate faulty components. You
should make a note of the displayed error code “
E110 “Safety Thermostat Operated displayed when the primary water pressure is less
than 0.5 bar. After repressurising the system the boiler should
operate. Your installer will be able to advise you about the
method of repressurising. “
E119 “Water Pressure Switch Not Operated displayed when the primary water pressure is less
than 0.5 bar. After repressurising the system the boiler should
operate. Your installer will be able to advise you about the
method of repressurising”
E33 “Interruption Of Gas Supply or Flame Failure indicates that the gas supply has been interrupted,
ignition has failed or the flame has not been detected. Ensure
that the gas supply has not been turned off, and turn the
selector switch to the reset position and hold for at least 5
seconds. If the boiler does not relight, or the code is displayed
regularly “
E60 Fan or Fan Wiring Fault

Main Error Code E133

A Main boiler showing the error code E133 means that the condensate pipe has frozen. This is an issue that can happen during the cold winter months as the condensate pipe leads outside but luckily this is an issue that can be resolved fairly quickly without the need for an engineer. You just need to thaw out the condensate pipe, which you can find out how to do with our guide.


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