Baxi E.02-.19 Fault Code: Causes, Fixes & Repair Costs
What does the Baxi E.02-.19 fault code mean?
The E.02-.19 code is a permanent lockout fault on Baxi boilers indicating that the control board (PCB) has detected a change in the position or state of Jumper 1 — a small physical connector on the circuit board used to define how the boiler is configured for a particular installation. The boiler will not restart until this configuration issue is correctly resolved. Note that closely related codes cover the same type of fault on the other jumpers: E.02-.20 refers to a change detected on Jumper 2, and E.02-.21 refers to Jumper 3. All three follow the same diagnostic and repair path — the relevant jumper must be inspected and correctly set by an engineer.
General guidance only — not a substitute for professional advice. Any gas work must be carried out by a Gas Safe registered engineer. If you smell gas or suspect carbon monoxide, leave the property and call the National Gas Emergency line on 0800 111 999.
Common causes
- Jumper accidentally displaced during a service or repair visit Common
The most frequent cause. When an engineer last opened the boiler — for a service, component swap, or fault diagnosis — Jumper 1 may have been knocked off its pins or left in the wrong position before the casing was refitted. The PCB detects the changed state on its next power-up and raises this permanent fault.
- PCB replaced without matching the original jumper configuration Common
If the control board was previously replaced, the replacement PCB may not have had its jumpers set to match the specific Baxi model and installation type. Each model variant can require a different jumper combination, and an incorrectly configured replacement board will immediately trigger this code.
- Physical vibration or disturbance to the boiler Sometimes
Jumper caps sit on small pins and rely on a friction fit. If the boiler has been knocked, moved, or subjected to sustained vibration — for example during building work nearby — the cap can work itself loose or fall off entirely.
- Age-related loosening or factory configuration defect Rare
On older boards, connector pins can become slightly corroded or the jumper cap's plastic clip can weaken over time, allowing it to creep off position without any obvious external cause. In rare cases a brand-new PCB may leave the factory with an incorrect jumper setting.
How to fix it
- Do not attempt to reset the boiler repeatedly DIY safe
Because E.02-.19 is classified as a permanent fault, pressing the reset button will not clear it. Repeated reset attempts will not help and may mask useful diagnostic information for the engineer. Leave the boiler in its current state.
- Check whether any recent work was carried out on the boiler DIY safe
Think back to the last time an engineer accessed the boiler — a service, a repair, or a parts replacement. This context is very useful to pass on when you call for help, as a disturbed jumper during that visit is the most likely explanation.
- Contact a Gas Safe registered engineer to inspect Jumper 1 on the PCB Gas Safe engineer
The boiler casing must be removed to access the control board — this is work that only a Gas Safe registered engineer should carry out. The engineer will locate Jumper 1 on the PCB, verify whether it is present and correctly positioned for your specific Baxi model and installation type, and reposition or replace it as needed. They may consult Baxi's technical documentation or the Baxi Works installer portal to confirm the correct setting.
- If repositioning the jumper does not clear the fault, the PCB may need replacement Gas Safe engineer
Should the fault persist after the jumper is correctly set — or if the board shows signs of physical damage such as burn marks or cracked solder joints — the engineer will recommend replacing the PCB. A new board must be configured with the correct jumper positions before fitting. PCB replacement is entirely an engineer task and should never be attempted without Gas Safe registration and the relevant competencies.
Parts you may need
- Baxi PCB jumper cap (replacement connector) · from £5
- Baxi replacement PCB (model-specific) · from £180
The exact spare depends on your boiler's GC number (on the data badge). Check this against the part before buying.
Typical repair cost
Expect to pay roughly £80–£280, depending on the underlying cause.
Frequently asked questions
Can I fix Baxi E.02-.19 myself by resetting the boiler?
No. This is a permanent fault code, which means the boiler will stay locked out regardless of how many times you press reset. The underlying cause — a displaced or incorrectly positioned jumper on the PCB — can only be addressed by opening the boiler casing and physically inspecting the control board. That work must be done by a Gas Safe registered engineer. Resetting repeatedly will not help and is not recommended.
What is a jumper on a boiler PCB and why does it matter?
A jumper is a tiny plastic-capped connector that bridges two pins on the circuit board. On Baxi boilers, jumpers such as Jumper 1, Jumper 2, and Jumper 3 are used to set configuration options — for example, to adapt the board to a particular boiler model or installation type. If a jumper is moved, dislodged, or missing, the PCB detects that the configuration no longer matches what it expects and raises a fault. In the case of E.02-.19 it is Jumper 1 that has changed; E.02-.20 and E.02-.21 indicate the same issue on Jumper 2 and Jumper 3 respectively.
How much does it cost to fix a Baxi E.02-.19 fault in the UK?
If the fix is simply repositioning a displaced jumper, you are likely looking at the cost of an engineer callout — typically £80 to £150 depending on your location and the engineer. If the PCB itself needs replacing, expect to pay roughly £200 to £280 including parts and labour for most Baxi models, as parts are widely available. Costs in London and the South East tend to run around 15–25% higher. In rare cases where a premium or older model PCB is harder to source, costs can exceed this range — worth discussing with the engineer before committing to a repair.
My boiler was recently serviced and now shows E.02-.19 — is that connected?
Almost certainly yes. The most common trigger for this fault is a jumper being accidentally displaced when the boiler casing is opened during a service or repair. Contact the engineer who carried out the work — they should return to investigate and correct the issue, ideally at no additional charge since the fault arose following their visit. Be clear when you call that the fault appeared immediately after the service.