What it means
Baxi's EcoBlue Advance, EcoBlue Plus and Duo-tec 2 GA user guides list E117. The EcoBlue Advance manual says it shows above 2.7 bar and clears once the pressure is brought back down.
What to check, in order
- Read the pressure gauge
With the system cool, Baxi says it should read between 1 and 2 bar.
- Make sure the filling loop is closed
Baxi's EcoBlue Plus user guide says the filling loop should be closed and disconnected after use.
- Contact your installer
Baxi's user guides say to contact your installer when E117 shows.
When to call a Gas Safe engineer
Baxi's EcoBlue user guides say E117 and E118 reset once the correct pressure is restored. If the pressure keeps climbing, have a Gas Safe registered engineer find out why.
Quick answers
What does the Baxi E117 fault code mean?
The pressure in the heating system has gone too high, so the boiler has stopped. Baxi gives 1 to 2 bar as the normal range. Baxi's EcoBlue Advance, EcoBlue Plus and Duo-tec 2 GA user guides list E117. The EcoBlue Advance manual says it shows above 2.7 bar and clears once the pressure is brought back down.
Can I fix Baxi E117 myself?
Moderate (about 10 minutes to check). Start with: read the pressure gauge; make sure the filling loop is closed; contact your installer. Baxi's EcoBlue user guides say E117 and E118 reset once the correct pressure is restored. If the pressure keeps climbing, have a Gas Safe registered engineer find out why.
Is Baxi E117 worth repairing?
Get a quote first. If the filling loop was left open, closing it may be all it takes. If the pressure keeps rising, an engineer needs to look.
Checked against
- Baxi EcoBlue Advance Combi user guide (PDF)
- Baxi EcoBlue Plus Combi user guide (PDF)
- Baxi Duo-tec 2 Combi GA user guide (PDF)
- Baxi: what should my boiler pressure be set at
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.