Quick answer
On Baxi boilers, fault code E117 means: Water pressure too high. The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.
Smell gas? Don't use switches or flames, open windows, close the gas valve, leave the building and call your gas emergency number. Never open the boiler casing yourself.
Can I keep using the boiler?
Severity: Medium
The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.
Common causes
- Faulty pressure relief valve or expansion vessel
- System overfilled when topping up the pressure
How to fix it
- Bleed the radiators to release trapped air, then re-check the pressure
- Have a qualified gas engineer inspect the boiler; never open gas or flue parts yourself
Frequently asked questions
What does Baxi error E117 mean?
On Baxi boilers, fault code E117 means: Water pressure too high.
How do I fix Baxi error E117?
Start with these steps: Bleed the radiators to release trapped air, then re-check the pressure; Have a qualified gas engineer inspect the boiler; never open gas or flue parts yourself.
Is it safe to use the boiler with fault E117?
Severity: Medium. The boiler has locked out for safety. Try the safe checks below and one reset; if the code returns, call a qualified gas engineer.