Do you have a Main boiler error code showing on your boiler?
All boilers go wrong from time to time. But are you facing a major issue with your Main boiler or something that’s super simple to fix? With our list of Main error codes and what they mean, you can get an indication of what the issue is.
Of course, unless you’re a Gas Safe engineer, you can’t attempt any fixes that involve unscrewing any panels, removing the boiler’s case or taking out any parts.
Need an expert opinion? No problem! You can book online at Herofix.com to arrange a 15-minute video call with a professional heating engineer to discuss your Main boiler’s fault.
Main boilers we have covered in this error code list:
Main Boiler Error Codes
| Error | 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 |
| E50 | Hot Water NTC Fault indicate faulty components |
| 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 Eco Compact Boiler
| Error | System Behaviour |
|---|---|
| E09 | Gas valve connection error |
| E15v | Gas valve error |
| E20 | Central heating negative thermistor coefficient (NTC) sensor error |
| E28 | Flue negative thermistor coefficient (NTC) sensor error |
| E40 | Central heating return sensor error |
| E83 | Communication error |
| E109 | Pre-circulation fault |
| E110 | Safety thermostat operated |
| E118 | Primary system water pressure too low |
| E125 | Circulation error |
| E128 | Flame error |
| E130 | Flue negative thermistor coefficient (NTC) sensor operated |
| E133 | Interruption of gas supply or flame error |
| E135 | Interruption of gas supply |
| E154 | Flow return sensor temperature test |
| E160 | Fan or fan wiring error |
| E270 | Circulation fault (dry fire) |
| E321 | Hot water negative thermistor coefficient (NTC) error |
| E384 | False flame |
Main Error Code E133
If your Main boiler is showing error code E133, the condensate pipe has frozen. It’s not an uncommon issue during the winter months, as the condensate pipe leads outside. Thankfully, you can fix this problem quickly without the need for an engineer, as you just need to thaw out the condensate pipe.
Would you like the reassurance of speaking to a qualified professional? If so, it’s time to book a 15-minute video call with the team at Herofix.com.
