Common problems guide

The most common Baxi Combi 130e problems

The faults most likely to send a Baxi Combi 130e into lockout — with plain-English causes, what to check first, estimated repair costs and whether you need a Gas Safe engineer.

This model is discontinued. Parts can be harder to source and expensive. If repair costs are mounting, a new A-rated boiler may be the smarter choice.
13 documented codes
6 most common
6 DIY-safe checks
0 engineer needed

The 6 most common faults

01
24 High DIY-safe

Your boiler has stopped working because it cannot light the flame or the internal drainage pipe is backed up with water.

What to try first

Check if your shared external white drainage pipe is frozen or blocked.If frozen, pour warm (not boiling) water over the pipe to clear the ice.Press the reset button once to see if the boiler restarts.

Est. cost
£90-280
Parts
Flame sensing electrode, Ignition lead, Gas valve
Full guide for 24
02
25 High DIY-safe

Your boiler has shut down because a safety sensor has detected that the system is starting to overheat.

What to try first

Ensure all radiator valves are fully openCheck that the system water pressure is between 1.0 and 1.5 barSwitch the selector dial to the reset position for five seconds and release

Est. cost
£120-£350
Parts
Safety Thermostat (Overheat Limit), Circulation Pump, Main Heat Exchanger (Descaling)
Full guide for 25
03
27 High DIY-safe

Your boiler is struggling to circulate water, which is usually caused by the system pressure being too low or a problem with the internal pump.

What to try first

Check the pressure gauge on the front of the boiler; it should be between 1.0 and 1.5 bar.If the pressure is too low, use the filling loop underneath the boiler to top it up.Reset the boiler by turning the selector switch to 'R' for five seconds.

Est. cost
£180-350
Parts
Circulating Pump, Water Pressure Sensor, Expansion Vessel Re-charge
Full guide for 27
04
A neon flashing High DIY-safe

Your boiler is struggling to light or cannot keep the flame burning, which has caused it to shut down for safety.

What to try first

Check that your gas pre-payment meter (if applicable) has credit.Verify that other gas appliances, like a cooker, are working to ensure gas supply exists.Reset the boiler by turning the selector switch to 'R' for at least five seconds and then back to the desire setting.

Est. cost
£100-£250
Parts
Ignition Electrode, Gas Valve, Flame Sensing Lead
Full guide for A neon flashing
05
B neon flashing High DIY-safe

Your boiler has stopped working because water is not moving through the system properly or there is not enough water inside it.

What to try first

Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is too low, use the filling loop to top it up.Ensure all radiator valves and isolation valves are fully open.

Est. cost
£180-350
Parts
Circulating Pump, Primary Water Pressure Switch, Flow Temperature Sensor
Full guide for B neon flashing
06
C neon flashing High DIY-safe

Your boiler has detected that water isn't moving through the internal pipes effectively, which prevents it from heating up safely.

What to try first

Check that the boiler pressure is between 1.0 and 1.5 bar on the gaugeOpen any radiator valves that are turned off to ensure water can flowEnsure the main stop tap and any isolation valves under the boiler are fully open

Est. cost
£120-280
Parts
Pump, Primary Flow Switch, Diaphragm
Full guide for C neon flashing

on the Baxi Combi 130e

Flame sensing electrodeIgnition leadGas valveCondensate trapSafety Thermostat (Overheat Limit)Circulation Pump

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
See the full 13-code list for the Baxi Combi 130e