Short answer
Chaffoteaux error 103 indicates insufficient circulation in the primary circuit on the Talia Green System variants documented here. The alert describes an operating condition: by itself, it does not prove that the pump has failed or identify a replacement part. Check your boiler’s full model designation before using an error-code table.
Error 103 on Chaffoteaux Talia: meaning and what to do
Code 103 means insufficient circulation on Talia Green System 12/25/35 EU and Talia Green System Evo HP. The HP range manual writes it as 1 03. The primary-circuit water is not circulating as the boiler controls expect; diagnosis is needed to determine the cause.
The code alone does not confirm a seized pump, a clogged filter or air in the system. Do not open the casing or handle connections, the pump, gas components or safety valves. If the lockout persists or returns, arrange a professional inspection instead of repeatedly resetting the boiler or replacing parts by trial and error.
Identify your Talia variant and consult its manual
Talia, Talia Green, System and Evo HP should not be treated as a single version. Note the full designation, reference and serial number from the accessible rating plate without dismantling the appliance. This guide is based on two specific documents:
- Official Talia Green System 12/25/35 EU manual: Italian edition for references 3310404, 3310405 and 3310406; table on printed page 27. It does not cover every revision sold in Spain.
- Official Talia Green System Evo HP manual: 45 to 150 kW range, distinct from the System 25 EU; table on printed page 64.
Talia Green System 12/25/35 EU
Document editing
Editing for Italy. References 3310404, 3310405, and 3310406; codes on page 27. It does not acknowledge other Spanish revisions.
Talia Green System HP 45–150
Document editing
Manual for Spain and Portugal of the HP range 45, 65, 85, 100, 115, and 150. Codes on page 64. Do not exchange with System 12/25/35 EU.
If your rating plate does not match one of these variants, use the manual supplied with your appliance or contact the manufacturer. Do not apply the table to a Talia from another generation or to an Ariston because the name or display looks similar.
What to check without opening the boiler
- Write down the full code exactly as displayed, including spaces and letters: 103, 1 03 and 1P1 are not the same notation.
- Check the displayed pressure against the range in your appliance’s manual. An apparently normal reading does not rule out a circulation problem.
- Note whether it happens during heating, hot water or both, and whether there are noises, visible leaks or radiators that do not heat up. These details help with diagnosis; they do not confirm a faulty part.
- If the alert returns, stop trying to reset it. Give the technical service the model, code, symptoms and your location.
Bleeding a radiator is not a universal solution for code 103. To distinguish symptoms, you can consult the radiator bleeding guide; only follow user-level operations permitted for your installation. The internal circuit must be inspected by a professional.
Error 103 and error 108: circulation and low water
Code 103 indicates insufficient circulation. In the manuals consulted, 108 indicates low water or a need to refill. Adding water without checking the pressure and the model-specific instructions will not necessarily resolve 103 and may overfill the system.
If 108 appears, consult your manual for the filling procedure and pressure. If pressure keeps dropping, there is a visible leak or you cannot identify the filling control, arrange an inspection. Do not use the safety valve as a routine way to reduce pressure.
Other Talia Green System EU codes
Guide to the Talia Green System 12/25/35 EU table. The column describes the alert; it is not an instruction to replace the component. Consult the table for your own variant.
| Code | Condition indicated |
|---|---|
| 101 | Overtemperature. |
| 103–107 | Insufficient circulation. |
| 108 | Low water; refill as instructed in the manual. |
| 110 / 112 / 114 | Electrical fault in the flow, return or outdoor sensor, respectively. |
| 203 | Electrical fault in the storage cylinder sensor. |
| 301 / 302 | EEPROM memory error or communication error, respectively. |
| 501 / 502 | No flame or flame detected while the gas valve is closed. |
| 504 | Flame loss. |
| 610 | Heat exchanger sensor open circuit on this EU variant. |
| 612 | Fan error. |
The model distinction matters: the Evo HP manual assigns 6 10 to an open thermal fuse, while the System EU manual uses 610 for the heat exchanger sensor. Do not transfer diagnoses or references between the two appliances.
Diagnosis and choosing a replacement part
For a persistent fault, you can contact Uniclima’s Chaffoteaux technical service. Provide a photo of the accessible rating plate, the code and when it appears. The repair and replacement part depend on diagnosis and the exact variant.
The Chaffoteaux catalogue lets you locate parts by reference. Check the reference, revision and compatibility before buying: code 103 does not confirm that a particular pump is compatible or needs replacing.
Frequently asked questions
On Talia Green System EU and Evo HP, the manuals consulted associate it with insufficient circulation. Identify the full model because this guide does not cover every Talia variant.
You cannot conclude that from the code. The cause must be diagnosed, and the model and part reference checked before replacement.
First check the pressure and your appliance’s manual. On the documented variants, 108 is the specific low-water alert; adding water without checking may overfill the system.
Do not keep resetting it. Note the code and symptoms and arrange a professional inspection; resetting does not fix the underlying cause.