PCB SYMSI7.0 For Saunier Duval Themaclassic C 25 E
The SYMSI7.0 PCB for Saunier Duval Themaclassic C 25 E, reference S1062000 from ERA, is a component that controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, may lock out, or may exhibit erratic behavior, potentially displaying the fault code F5: Overheating. This PCB is compatible with boilers from the ThemaClassic range, such as the ThemaClassic F 25 E and C 25 E, as well as with models from the Isotwin range. It is recommended to replace it upon noticing any of these symptoms or when experiencing faults in its operation.
Saunier Duval boilers compatible with reference S1062000
PCB with reference S1062000. Three confirmed compatibilities: ThemaClassic F 25 E and ThemaClassic C 25 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval ThemaClassic F 25 E | ThemaClassic | Contrasted |
| Saunier Duval ThemaClassic C 25 E | ThemaClassic | Contrasted |
| Saunier Duval Isotwin F 28 EA | Isotwin | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. S1062000 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference S1062000. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the PCB S1062000 resolves.
The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not turn on at all, no lights or response.
Cause: The PCB is the brain of the boiler; if it does not receive or process the power supply, there is no activity in any component.
Check if there is power to the boiler and make sure that the main fuse is not blown before declaring the PCB faulty.
- 02
The thermostat is calling for heat and the boiler is not responding.
Cause: If the PCB does not process the demand signal, the start command does not reach the burner, pump, or gas valve.
Check that the thermostat is sending a signal, for example by bridging the demand terminals, before replacing the PCB.
- 03
The boiler tries to ignite but shuts down immediately, with or without a fault code.
Cause: A fault in a relay on the PCB interrupts the ignition sequence halfway through the process.
Note the fault code displayed and check it in the manual before replacing the complete PCB.
- 04
The boiler ignites some days and not others, irregularly.
Cause: A cold solder joint or a poor connection on the PCB can cause random faults that do not always recur.
Gently tap the control board while the boiler is running to see if the fault recurs; if so, it points to a poor connection on the PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F5 | Overheating | The boiler stops for safety reasons when it detects overheating. This can happen if the PCB is not functioning properly and does not detect the correct temperature. Check the condition of the PCB to ensure it is operational. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the Saunier Duval S1062000 PCB.
- Catalogue reference
- S1062000
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 0 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- PCB model (silkscreened)
- SYMSI7.0
- PCB code (silkscreened)
- 0310144400L12
- Relay 1
- OMRON G5Q-1, DC24V, 5A/250VAC - 10A/250VAC, batch CHINA 218400
- Relay 2
- OMRON G5G-1, DC24V, 6A/30VDC - 15A/250VAC, batch CHINA 15744CC
- Optocoupler U102
- COSMO 2010 4N35 D46B
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Themaclassic F 25 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB S1062000
Does this SYMSI7.0 PCB work for an Isotwin F 24 EA?
What code is printed on the PCB of the Themaclassic C 25 E?
When should this PCB be replaced in a Themaclassic F 25 E?
Spare parts related to Saunier Duval ThemaClassic
