BAXI boilers used to be great, so it's unlikely your relic will give you much problems but clearly it has. So, here we go...
Introducing a woefully boring rundown of common BAXI problems & fault/error codes - applicable to BAXI 100, 200, 300, 400 & 600 combi, BAXI Duo-tec and EcoBlue combi’s in 2024.
First, check your BAXI warranty
All new BAXI boilers come with at the very least, a 2-year warranty with warranties up to a 10-years available, when they're installed by a BAXI-accredited installer.
Nobody really buys BAXI anymore so chances are you don’t have the paperwork for a boiler that the previous (and now dead) owners of your house threw in on the cheap before Gas Safe was even a thing.
Fortunately, there’s a million great engineers who can charm BAXI’s like snakes and likely recover your boiler. 🐍
Worst case, get a quote for a new boiler fitted by top engineers near you.
Don't forget that you'll need to have kept up your annual services in order to keep your warranty valid - your boiler warranty paperwork will detail this.
The below-mentioned fault codes are large errors with the boiler unit itself which means that if you're still covered by your warranty and had the boiler serviced annually, you should be covered for all these faults.
If required, here's a snapshot of what we charge for a typical, straightforward combi swap:
Boiler Model | From Price | |
Ideal Logic*No longer fitted by Heatable | £1,995 | |
Viessmann Vitodens 050-W | £1,990 | |
Viessmann Vitodens 100-W | £2,455 | |
Viessmann Vitodens 111-W*By reque | £4,180 | |
Worcester-Bosch 4000 | £2,890 | |
Worcester-Bosch 8000 | £3,200 |
Turn it off and on again 🙄
Occasionally your boiler will display fault codes in error or because it very briefly detected an issue that didn't materialise. When it does this, the fault code will remain until it no longer detects the problem.
Sometimes though, it will require a bit of a nudge to detect this and restarting the boiler can be the wake-up call it needs to realise that actually, everything is alright.
Most Baxi boilers have a simple reset button on the front panel - locate this and press and hold the button for 1 to 3 seconds or until it's clear that the boiler has rebooted itself.
Baxi fault codes
[Applicable to Baxi 100, 200, 300, 400 & 600 combi, Baxi Duo-tec and EcoBlue combi in 2024]
Fault code | Source of erro | Heating engineer required? | Approx cost |
E09 | Gas valve connection cable | No - Baxi recommend initial reset before calling engineer | N/A |
E15 | Gas valve fault | No - Baxi recommend initial reset before calling engineer | N/A |
E20 | Central heating NTC *Negative Temperature Coefficient fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £200-£300 |
E28 | Flue fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £150-£300 |
E40 | Central heating return fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £60-£100 |
E55 | Calibration required | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £60-£100 |
E109 | Pre-circulation fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £100-£200 |
E110 | Safety thermostat operated | No - Baxi recommend initial reset before calling engineer | N/A |
E117 | Water pressure too high | No - manually alter pressure gauge first | £50-£100 |
E118 | Water pressure too low | No - manually alter pressure gauge first | £50-£100 |
E125 | Circulation fault (primary) | No - Baxi recommend initial reset before calling engineer | N/A |
E128 | Flame failure | No - Baxi recommend initial reset before calling engineer | N/A |
E130 | Flue NCS operated | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £50-£100 |
E133 | Gas supply interrupted or flame ignite failure | No - Baxi recommend initial reset before calling engineer | N/A |
E134 | Gas valve open without gas - time elapsed | No - Baxi recommend initial reset before calling engineer | N/A |
E135 | Interruption of gas supply | No - Baxi recommend initial reset before calling engineer | N/A |
E154 | Flow/return sensor temperature test | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £50-£100 |
E160 | Fan fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £150-£200 |
E270 | Circulation fault (dry fire) | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £100-£150 |
E321 | Hot water NTC fault | Yes - contact Baxi (if under warranty/Gas Safe engineer if not) | £200-300 |
E384 | False flame | No - Baxi recommend initial reset before calling engineer | N/A |
Beyond repair? If it's a taxi for Baxi, compare quotes for a new boiler.
Have issues with your combi boiler? Read our boiler problems and solutions for quick troubleshooting guidance.
BAXI buggered? What now?
You may need a new boiler.
You may need it fast, and with affordable monthly payments.
You may even need it from a company with top end local engineers, with 10,000 Trust Pilot reviews to back them up. Plus a Which? Trusted Trader award for good measure.
You may need a new boiler quote from us, Heatable 😘
