Error code
Baxi Boiler E97 — Code Meaning
Incorrect electrical-supply frequency. Only for ECOFOUR 1.14, 1.24, 24, 1.14 F, 1.24 F and 24 F in Baxi Czech service/parts manual 5/2010, page 18, hosted by Baxi Slovakia. This is not proof for every UK Baxi model.
Quick answer
E97: Incorrect electrical-supply frequency
Meaning
Incorrect electrical-supply frequency
First safe check
Photograph the full display, including alternating characters and suffixes.
Stop if
The warning remains, the appliance is not operating normally, or the next step requires internal access.
Who to call
Contact a Gas Safe registered engineer qualified for this boiler if the warning remains, the code is not explained in the matching manual, or any internal investigation is required.
Internal diagnosis and repair require a qualified professional. Follow only the model-approved user actions described below. Keep checks outside the casing and use only a manufacturer-approved reset where the manual allows it.
What does this error code mean?
Incorrect electrical-supply frequency.
Only for ECOFOUR 1.14, 1.24, 24, 1.14 F, 1.24 F and 24 F in Baxi Czech service/parts manual 5/2010, page 18, hosted by Baxi Slovakia. This is not proof for every UK Baxi model.
The reported condition does not, by itself, establish which part needs replacement.
Why is this happening?
- The manufacturer describes: incorrect electrical-supply frequency. The underlying cause requires assessment on the actual model.
Safe next steps
- Photograph the full display, including alternating characters and suffixes.
- Record the full model from accessible paperwork or an external label; do not dismantle the appliance to find it.
- Match the source below to your exact model manual before following any code-specific instructions.
- If the warning persists, the model is uncertain or the next step requires internal access, stop and contact a Gas Safe registered engineer qualified for this boiler.
Can I fix this myself?
NoUse only the external checks described here. The code alone does not justify a parts replacement.
Safety boundary: Do not remove the boiler casing or work on gas, flue components, combustion settings or internal wiring.
What not to do
- Do not remove the boiler casing or work on gas, flue components, combustion settings or internal wiring.
- Do not repeatedly reset an unexplained or returning warning, or buy parts solely from this display.
When to call a heating professional
Contact a Gas Safe registered engineer qualified for this boiler if the warning remains, the code is not explained in the matching manual, or any internal investigation is required.
Safety warning
Do not remove the boiler casing or work on gas, flue components, combustion settings or internal wiring.
Useful hub links
Other Baxi boiler codes
Baxi Boiler E50 — Meaning and Safe Advice
Domestic-hot-water NTC sensor circuit fault
Baxi Boiler E55 — Code Meaning
Electronic board has not been programmed
Baxi Boiler E78 — Code Meaning
Gas-valve calibration voltage-limit warning
Baxi Boiler E96 — Code Meaning
Shutdown caused by supply-voltage fluctuation
Relevant guide
Frequently asked questions
Does E97 identify a failed part?+
No. A code describes a reported condition, and the correct model documentation is needed before diagnosis.
Does this apply to every model?+
Only for ECOFOUR 1.14, 1.24, 24, 1.14 F, 1.24 F and 24 F in Baxi Czech service/parts manual 5/2010, page 18, hosted by Baxi Slovakia. This is not proof for every UK Baxi model.
Sources and review status
Model dependent · Last reviewed 21 September 2026
- Baxi ECOFOUR service and parts manual 5/2010, page 18
model manual · EU · checked 21 September 2026
Incorrect electrical-supply frequency. Only for ECOFOUR 1.14, 1.24, 24, 1.14 F, 1.24 F and 24 F in Baxi Czech service/parts manual 5/2010, page 18, hosted by Baxi Slovakia. This is not proof for every UK Baxi model.