Baxi E133: gas supply or ignition failure on a Baxi combi
E133 is Baxi's ignition failure code. It looks alarming but the diagnosis is methodical, and the outcome is usually a modest repair.
Practical notes on a Baxi E133 fault
- Check the gas hob before booking a boiler engineer
- Prepayment meters running out cause identical symptoms
- Condensate blockages are seasonal and very common
- Electrode condition is assessed against Baxi's spec
- Analyser readings verify the appliance after any gas-side work
Published business details
- Based at 24 Bristol Road, Radstock, BA3 3EE
- Telephone enquiries: 07516 118198
- Opening hours: Monday to Friday, 8:30am to 5:00pm
A Baxi E133 fault explained in plain terms
Start outside the boiler: is gas reaching other appliances, is the meter credit intact, is the emergency control valve open. Then the condensate route, which is a frequent winter cause. Then ignition components. Gas valve replacement or recalibration is the last step and is confirmed with combustion analysis, never by ear.
Where we deal with this
Get a Baxi E133 fault looked at properly
In practice: Rule out supply and condensate before parts. Most E133 calls end with a clean, a component and a combustion check.
Include the appliance make and model in your enquiry so the correct technical information can be checked.
Questions we get asked
- Should I keep pressing reset?
- Twice at most. An appliance that cannot prove a flame should not be forced to keep trying.
- Could a power cut have caused it?
- A brownout can interrupt an ignition cycle, but a healthy boiler should relight after a single reset.
Related help pages
- Fault differentiationIdeal L2: why the same code means different repairs
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- Standing pilot faultPilot light will not stay lit: the thermocouple and draught checks
- Symptom guideNo hot water but the heating works: what that combination means
- Void period managementHeating compliance during a void period between tenancies
- Oil boiler comparisonInternal vs external oil boilers: which suits your property
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