BoilerFaultCodesThe 6 most common faults
01
E119 High DIY-safe
Your boiler has temporarily stopped working because the water pressure inside the system has dropped too low.
What to try first
Locate the filling loop (two valves connected by a flexible silver hose under the boiler).Open both valves slowly to let mains water into the system while watching the pressure gauge on the front panel.Stop filling when the needle reaches between 1.0 and 1.5 bar, then firmly close both valves.
02
E20 High Engineer
Your boiler has lost track of how hot the water inside the heating system is because a temperature sensor is not working properly.
Full guide for E2003
E28 High Engineer
Your boiler has temporarily stopped working because it has detected a problem with the temperature sensor located in the exhaust flue.
Full guide for E2804
E125 High Engineer
Your boiler has stopped working because water is not flowing properly through the internal pipes to heat your home.
Full guide for E12505
E133 High Engineer
Your boiler has stopped working because it is not receiving enough gas or the flame has gone out.
Full guide for E13306
E160 High Engineer
Your boiler has detected an issue with the internal fan that safely pushes harmful exhaust gases outside, so it has shut down to protect your home.
Full guide for E160on the Baxi Platinum Combi HE (2007)
Water Pressure SwitchPressure Relief ValveExpansion VesselCentral Heating NTC SensorWiring HarnessFlue NTC Sensor
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Baxi shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue