Baxi boiler showing E133 in Coventry? It means the boiler could not light, most often because gas is not reaching it. What to check first.
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E133 is one of the most searched Baxi codes. On most current Baxi combis it means an ignition failure. The boiler tried to light and could not.
The most common reason is that gas is not reaching it. That is good news, because the first checks are yours to make. If the supply is fine, the fault is inside the boiler. Check your manual, as Baxi codes vary a little between models.
Coventry has a large number of Baxi combis in flats and smaller homes around Foleshill, Stoke and the city centre. They are compact, so one worn part can stop the whole unit.
If other gas appliances will not light, the supply is the problem. Check a prepayment meter has credit before anything else.
On a cold morning the outside condensate pipe can freeze. Warm water along it and one reset often brings the boiler back.
Use the reset as your manual shows, once. If E133 comes straight back, leave it off.
Supply and burner pressure, the ignition electrode, the gas valve and the flue. In most cases it is a part-level repair.
The engineer tests the supply, then watches the boiler try to light. That shows whether the spark, the gas or the flame sensing is failing. Most visits take one to two hours.
A photo of the display and the label inside the boiler door. Tell us if the hob works and whether you are on a prepayment meter.
No. The boiler has stopped itself because it could not light. Smell gas? Leave the house, do not use switches, and call the National Gas Emergency line on 0800 111 999. A fault code is never a gas leak, but a smell always is.
An intermittent ignition failure usually means a tired electrode or a marginal gas pressure. It is worth diagnosing before it fails for good in mid-winter.
Ask to see their Gas Safe ID card. The back shows the work they are signed off for.
The failed part and the time it takes to reach it. An electrode is a short job. A gas valve takes longer. The diagnosis tells you which, before you agree to the work.
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