Main PCB Saunier Duval Isofast Condens F35 A 1 Ref. 0020212697
The Main PCB Saunier Duval Isofast Condens F35 A 1 is the component that controls the ignition, burner modulation, pump, and safety features of the boiler. When it malfunctions, the boiler may fail to start, lock out, or operate erratically. The associated fault codes include F.63, F.64, F.65, and F.67, which indicate specific issues in the boiler's electronics. This board is compatible with models from the Isofast Condens range, such as the Isofast Condens F35 A/1, among others. It should be replaced when these malfunction symptoms are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020212697
PCB with reference 0020212697. A proven compatibility: Isofast Condens F35 A/1.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isofast Condens F35 A/1 | Isofast Condens | 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. 0020212697 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 0020212697. 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 0020212697 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 ignite, nor does the pilot light activate.
Cause: If the PCB does not work, the boiler cannot be started, even if it receives power.
Check the internal fuse of the PCB and make sure it receives 230V before replacing it.
- 02
A different fault code appears frequently, without repeating.
Cause: A damaged PCB can randomly trigger safety protections due to faults in its readings.
Note the fault codes for a few days: if there is no pattern, it is most likely that the problem is with the PCB.
- 03
The remote control or the thermostat do not connect to the boiler.
Cause: The PCB contains the communication module; if it fails, the boiler does not receive external commands.
Test the remote control in another installation if you can, or check the batteries and the bus wiring.
- 04
The boiler starts but shuts down after a few seconds without modulating.
Cause: The PCB can interrupt the ignition before the flame stabilizes.
Make sure there is no ionization or pressure error on the display indicating another issue before replacing the PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.63 | EEPROM memory fault of the boiler's electronic control. | The EEPROM resides in the main PCB itself (this piece); a read/write fault in its memory originates from the electronics. It is checked by ruling out interference and, if it persists after restarting, by replacing the PCB. |
| F.64 | Fault in the electronics related to the NTC sensor input. | The processing of the NTC signal is done by the PCB; with the short circuit in the NTC flow/return sensor ruled out (measure the sensor's resistance), the remaining documented cause is a fault in the electronics/PCB itself. |
| F.65 | Electronic temperature fault (PCB overheating). | It is detected and caused by the PCB itself; first verify that there is no external source of abnormal heat and, if ruled out, the code indicates a fault in the electronics/PCB. |
| F.67 | Electronics/flame fault: flame signal not plausible for the control. | The flame signal detection and validation circuit is on the PCB; when the received signal is not plausible and the ionisation electrode is ruled out, the documented cause is an electronics/PCB fault. |
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 PCB 0020212697
- Catalogue reference
- 0020212697
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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.
- voltage
- 240 Vac
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Isofast Condens F35 A/1 Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020212697
For which other boilers besides the Isofast Condens F35 A/1 is this PCB Ref. 0020212697 suitable?
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