- Boilers
- Gas boiler
108
Chaffoteaux 108 on a gas boiler: not enough water in the system
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
Chaffoteaux 108 means not enough water and asks for a top up. Open the filling valve at the bottom, press MODE for 5 seconds until PURGE shows and close it when the indicator reads between 0.6 and 1.5 bar. If it happens often, call a technician.
Safety first
Stop and check this first
- If you smell gas: Chaffoteaux says to close the main gas tap, open the windows and call the technician. Do not operate switches or light flames, leave the home and call your gas distributor's emergency number from outside. If you smell burning or see smoke, cut the power, close the gas and ventilate.
- Always close the filling tap afterwards. If you have to add water very often, Chaffoteaux says to switch the boiler off, disconnect it, close the gas and call a technician.
Safe checks you can perform
- Pressure on the indicator
- Top up with Chaffoteaux's procedure
- Visible leaks
- Leak search by the technician
Leave these tasks to a qualified professional
- Do not attempt this professional task: Pressure reading check
- Do not attempt this professional task: Pressure drop test
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.
Pressure reading check
What they doIf actual pressure is correct and the code stays, the technician checks the boiler's pressure reading.
They must show youthe actual pressure against what the boiler shows.
In writingany part replaced and why.
Pressure drop test
What they doThe technician leaves the system at rest, checks whether pressure falls and looks for the leak.
They must show youthe pressure at the start and end.
In writingwhere the leak was and what was repaired.
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.
Pressure on the indicator
- Who:
- you.
- How:
- look at the pressure the boiler shows.
- Result that matters:
- whether it is below the filling range.
- If it is low:
- top up as the next check describes.
- If it is right and 108 stays:
- do not add more and call the technician.
- Evidence to keep:
- a photo of the pressure indicator and the display.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Top up with Chaffoteaux's procedure
- Who:
- you.
- How:
- open the filling valve at the bottom of the boiler and press MODE for 5 seconds until PURGE appears. When the indicator reads between 0.6 and 1.5 bar, close the tap and press MODE.
- Result that matters:
- whether the pressure rises, holds and the display returns to normal.
- If it holds:
- it was a one off low pressure; note the date.
- If it drops again soon:
- there is a leak; do not keep topping up.
- Evidence to keep:
- photos of the indicator before and after and the date of each top up.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Visible leaks
- Who:
- you.
- How:
- look under the boiler, radiators and valves for water or drips, without taking anything apart.
- Result that matters:
- whether there is a visible leak.
- If you see water or drips:
- switch the boiler off, set the external switch to OFF, close the gas and call the technician.
- If everything is dry and pressure holds:
- nothing more is needed.
- Evidence to keep:
- photos of stains or drips.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Leak search by the technician
- Who:
- specialist technician.
- How:
- checks for water leaks in the boiler and the system.
- Result that matters:
- where the water is going.
- If the leak is found:
- it is repaired.
- If there is none and 108 stays with correct pressure:
- the boiler's pressure reading is checked.
- Evidence to keep:
- a report of what was checked and repaired.
Chaffoteaux reserves repairs for its technical service or a qualified technician: opening the boiler is not the user's job.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de 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
- Chaffoteaux
- Product type
- Gas boiler
Known code variants
- 1 08
- Ariston 1 08
- Ariston E108
- Chaffoteaux 1 08
- Clas One 108
- Error 108 Ariston
- Error 108 Chaffoteaux
- Pigma 108
What it means
In the Pigma Advance table, 108 is lack of water, filling required. Chaffoteaux explains that if water pressure in the heating circuit is too low, the boiler makes a safety stop that is cleared by adding water. If water has to be added very often, the manual asks for a technician to check for leaks. The code watches pressure, it does not find the leak.
Warnings and stop conditions
- Criticaleditorial warning
If you smell gas: Chaffoteaux says to close the main gas tap, open the windows and call the technician. Do not operate switches or light flames, leave the home and call your gas distributor's emergency number from outside. If you smell burning or see smoke, cut the power, close the gas and ventilate.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
- Mediumsource verified
Always close the filling tap afterwards. If you have to add water very often, Chaffoteaux says to switch the boiler off, disconnect it, close the gas and call a technician.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Symptoms and causes
Probable causes · in order
- One off low pressureCommon
Pressure drops after bleeding radiators or over time. If it holds for weeks after topping up, that was it.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
- Water leak in the systemPossible
If top ups are needed very often, Chaffoteaux asks for leaks to be checked. It fits with stains or drips.
Evidence: Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Virtual technician
Does 108 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
- 1
Chaffoteaux Pigma Advance y Pigma Ultra, manual de usuario
Chaffoteaux · 2018 · manual
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