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.
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. A part-level repair in most cases.
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. 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.
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