- Boilers
- Gas boiler
E117
Baxi E117 on a gas boiler: circuit pressure too high
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Baxi E117 means pressure in the hydraulic circuit is too high, above 2.7 bar. Read the gauge with the system cold and check the filling tap is closed. Baxi says to call the authorised service centre.
Safety first
Stop and check this first
- Do not drain water by loosening fittings or touch the safety valve: the water can be very hot and under pressure. Baxi says to call the service centre for 117.
- If you smell gas: Baxi says to switch the boiler off, not to operate any electrical device or switch on lights, to put out any flame and open the windows. Then leave the home and call your gas distributor's emergency line and the service centre from outside.
Safe checks you can perform
- Cold pressure on the gauge
- Filling tap closed
- Water from the safety valve
- Pressure check by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Real pressure against the boiler's
- Do not attempt this professional task: Expansion vessel and filling tap check
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Real pressure against the boiler's
What they doThe technician measures circuit pressure with a gauge and compares it with the boiler gauge and item 05.
They must show youboth readings.
In writingthe result.
Expansion vessel and filling tap check
What they doThe technician checks the expansion vessel pre charge and that the filling tap closes properly.
They must show youthe vessel pressure.
In writingwhat was recharged or replaced.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Cold pressure on the gauge
- Who:
- you.
- How:
- with the system cold, read the boiler gauge. Baxi asks for 1 to 1.5 bar. You can also see it in the information menu, item 05.
- Result that matters:
- what it reads.
- If it reads above 2.7 bar:
- it matches E117; call the service centre.
- If it reads 1 to 1.5 bar:
- the boiler's reading does not match; tell the technician.
- Evidence to keep:
- a photo of the gauge and the display.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Filling tap closed
- Who:
- you.
- How:
- check the boiler's filling tap is fully closed, without forcing it.
- Result that matters:
- whether it was open.
- If it was open:
- close it and tell the technician; extra water may have got in.
- If it was closed:
- the rise has another source.
- Evidence to keep:
- a photo of the tap.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Water from the safety valve
- Who:
- you.
- How:
- see whether water comes or has come out of the boiler's drain pipe, without touching the valve.
- Result that matters:
- whether there is water.
- If water comes out:
- pressure has opened the safety valve; tell the technician.
- If not:
- note what you see.
- Evidence to keep:
- photos of the area.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Pressure check by the technician
- Who:
- technician from the authorised service centre.
- How:
- measures real pressure and checks the filling tap, the expansion vessel and the boiler's reading.
- Result that matters:
- why pressure rises.
- If the expansion vessel has lost its charge:
- it is recharged or replaced.
- If real pressure is normal:
- the boiler's measurement is checked.
- Evidence to keep:
- a report with the measured pressure and what was corrected.
Baxi says to call the authorised service centre: opening the boiler or touching the gas line or flue is not the user's job.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Boilers
- Brand
- Baxi
- Product type
- Gas boiler
Known code variants
- 117
- Baxi 117
- Baxi E 117
- Error 117 Baxi
- Platinum Compact 117
What it means
On the Platinum Compact ECO, code 117 is pressure too high in the hydraulic circuit (above 2.7 bar), and Baxi's remedy is to call the authorised service centre. Baxi asks for cold pressure on the gauge between 1 and 1.5 bar. The code does not say why pressure rose or whether the reading is right: the technician must check the real pressure and what makes it rise.
Warnings and stop conditions
- Mediumeditorial warning
Do not drain water by loosening fittings or touch the safety valve: the water can be very hot and under pressure. Baxi says to call the service centre for 117.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
- Criticaleditorial warning
If you smell gas: Baxi says to switch the boiler off, not to operate any electrical device or switch on lights, to put out any flame and open the windows. Then leave the home and call your gas distributor's emergency line and the service centre from outside.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Symptoms and causes
Probable causes · in order
- Pressure really high in the circuitPossible
If the gauge also shows more than 2.7 bar, the pressure is real and the technician must find out why it rose.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
- Too much water when topping upPossible
If E117 appears right after a top up, it fits having gone past the 1 to 1.5 bar Baxi asks for.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
- Wrong pressure readingLess common
If the gauge shows normal cold pressure and E117 stays, the boiler's reading must be checked.
Evidence: Baxi Platinum Compact ECO, instrucciones de funcionamiento y mantenimiento para el usuario
Virtual technician
Does E117 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
Was this entry useful?