BoilerFaultCodesBaxi E133 Fault Code
The Baxi E133 fault code means: your boiler is not receiving enough gas or is struggling to light the flame needed to heat your water and radiators.. It appears on 18 Baxi models in our database.
Technical description: Interruption Of Gas Supply or Flame Failure
What causes the Baxi E133 fault?
This fault occurs when the boiler tries to ignite three times but fails to establish or maintain a steady flame. The most common reasons are an interruption in the gas supply, a blocked pipe, or a component inside the boiler being unable to create the spark needed to light the gas.
This fault is frequently seen during extreme cold snaps, as the external condensate pipe can freeze and back up, preventing the boiler from lighting safely.
DIY fix possible
Check that your gas emergency control valve is open and any prepaid gas meter has credit.Ensure other gas appliances, like a hob, are working to confirm gas supply to the property.If it is freezing outside, check if your external condensate pipe has frozen and gently thaw it with warm water.Press the Reset button for five seconds to attempt to restart the boiler.
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Baxi models that show the E133 fault code
Click a model for the full fault code list and model-specific repair notes.
- 124 Combi Repair: £80-220
- 128 Combi Repair: £80-220
- Assure Repair: £120-300
- Duo-tec Combi ErP Repair: £120-250
- Duo-tec Combi GA Repair: £120-250
- Duo-tec Combi HE Repair: £120-250
- Duo-tec Combi HE A Repair: £120-250
- Megaflo System Repair: £120-250
- Neta-tec Combi 24 GA
- Neta-tec Combi 28 GA
- Neta-tec Combi 33 GA
- Platinum 24 Combi ErP Repair: £100-£250
- Platinum 28 Combi ErP Repair: £100-350
- Platinum Combi HE Repair: £100-£250
- Platinum Combi HE (2007) Repair: £150-£350
- Platinum Combi HE A Repair: £120-250
- Platinum Heat Repair: £100-£350
- Platinum+ 40 Combi Repair: £100-£250
Source
Baxi E133 fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026