Same-day repairs for every Baxi model — Platinum, Duo-tec, 400/600/800 and EcoBlue — by Gas Safe engineers who see Baxis every week. Common parts on the van, honest quotes, one-visit fixes where the parts allow.
Common Baxi codes we clear daily
E133
Average reply under 10 minutes. No obligation.
Baxi’s Duo-tec and Platinum ranges are workhorses — you’ll find them in tens of thousands of London flats and terraces. But like every brand, the patterns are predictable. In hard-water postcodes across the capital we see sludge-driven E110 overheats and E125 circulation faults on systems that have never been flushed. On older Duo-tecs the ignition electrodes drift out of spec and start throwing E133 lockouts, usually on the first cold snap of autumn. E118 low-pressure lockouts are almost always a slow leak on a joint under a floor or behind a bathroom panel — not the boiler itself.
The parts network is strong: Baxi PCBs, fans, pumps and heat exchangers are stocked at every major wholesaler in London, which is why our first-visit fix rate on Baxi is one of the highest of any brand alongside Vaillant and Worcester Bosch. Combine a repair with a proper power flush and a magnetic filter and most Baxis will run cleanly for another decade.
E125
E110
400 Combi
On a 12+ year Baxi with a major fault, we’ll give you honest repair-vs-replace numbers on site — see our new boiler installation options.
Diagnostic visit
Ignition electrode replacement (E133)
PCB replacement
— EAST DULWICH
“E110 lockout. Diagnosed a sludged heat exchanger, flushed the system and cleared the fault the same day.”
E110 is an overheat. It’s usually caused by sludge restricting flow through the heat exchanger. A power flush plus a magnetic filter typically clears it and keeps it clear.
£280–£450 fitted for most Baxi models. We’ll always quote before we start and check whether a repair still makes sense on older units.
