A boiler fault or error code flashing on your display can be worrying, especially when it happens on a cold day. While some codes point to simple issues that you can fix yourself, others signal more serious faults that need professional attention. Understanding what these error codes mean can help you know when to reset your system and when to call a Gas Safe engineer.
Common Boiler Error Codes and Their Meanings
1. Low Boiler Pressure (e.g. F1, E119, 118)
Low pressure is one of the most frequent boiler issues. You may notice your radiators aren’t heating properly, or your boiler switches off unexpectedly. Check your pressure gauge as it should usually sit around 1 to 1.5 bar. If it’s lower, you can top it up using the filling loop under your boiler. If pressure drops again soon after, it may indicate a leak or a faulty pressure valve that needs professional repair.
2. Ignition Failure (e.g. F28, EA, E133)
This code appears when your boiler can’t ignite. Common causes include gas supply issues, a faulty ignition lead, or problems with the electrode. Try resetting your boiler once, but if the code returns, contact a qualified heating engineer in Kirkintilloch or Bearsden to diagnose and safely fix the fault.
3. Frozen Condensate Pipe (e.g. F1, EA, or specific freeze warning)
In winter, condensate pipes can freeze, causing blockages that stop the boiler from working. You can thaw the pipe carefully with warm (not boiling) water and reset the boiler. If the issue keeps happening, an engineer can insulate or reroute the pipe to prevent it from freezing again.
4. Overheating (e.g. E1, 117, F20)
An overheating boiler often shuts down to protect itself. This might happen due to a failed pump, blocked pipes, or a problem with the thermostat. These faults require a boiler repair in Bearsden or Kirkintilloch by a professional engineer.
5. Fan or Flue Faults (e.g. F3, E110)
If your boiler can’t vent gases safely, it will show a fan or flue-related error code and stop operating. These safety features prevent carbon monoxide leaks. Only a Gas Safe registered engineer should handle these repairs.
What to Do When an Error Code Appears
If your boiler shows an error code:
- Check your user manual to identify what the code means.
- Reset your boiler if it’s a minor issue like low pressure.
- Avoid opening or tampering with the boiler’s internal parts.
- Call a qualified engineer if the problem persists or relates to ignition, overheating, or gas supply.
Professional Boiler Repairs and Servicing in Bearsden and Kirkintilloch
If your boiler is showing an error code or struggling to heat your home, our heating engineers can help. We provide expert boiler repairs in Kirkintilloch, Bearsden, and the surrounding areas.
