Saunier Duval Isomax F 28E PCB Ref. 05724800
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the Saunier Duval Isomax F 28E PCB Ref. 05724800. This board controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, you may see fault codes F.28 or F.29, which indicate a fault in the burner ignition. It is compatible with models from the Isofast and Isomax ranges, such as the C 28 E and F 28 E, among others. It is recommended to replace it when it shows signs of malfunction.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05724800
PCB with reference 05724800. Eight confirmed compatibilities: C 28 E and C 28 E NOx.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 28 E | Isofast | Contrasted |
| Saunier Duval C 28 E NOx | Isofast | Contrasted |
| Saunier Duval F 28 E | Isofast | Contrasted |
| Saunier Duval C 35 E | Isofast | Contrasted |
| Saunier Duval F 35 E | Isofast | Contrasted |
| Saunier Duval C 24 E V | Isofast | Contrasted |
| Saunier Duval C 28 E | Isomax | Contrasted |
| Saunier Duval F 28 E | Isomax | 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. 05724800 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 05724800. 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 05724800 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 respond, it does not turn on or show lights when pressing buttons.
Cause: The fuse on the PCB may be blown or the transformer may have stopped receiving power.
Check if the fuse is blown before replacing the entire PCB.
- 02
An error code appears that is not related to any visible problem in the boiler.
Cause: A fault in the control circuit of the PCB can generate alerts without there being a real fault in the components.
Reset the boiler and check if the fault code appears at the same moment during startup.
- 03
The remote control or the control panel does not respond to any commands.
Cause: If the communication of the PCB fails, the control cannot operate the boiler even if it is properly connected.
Check the wiring of the control and its connection on the terminal block before replacing the PCB.
- 04
The boiler loses the time and settings every time there is a power outage.
Cause: If the PCB does not properly maintain the backup power supply for the memory, it forgets the configuration when it loses power.
Check if the problem occurs every time after a power outage or if it has only happened once before deciding on the replacement.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.28 | Ignition fault of the burner | The burner does not ignite after five attempts, indicating a problem in the ignition process. This may be caused by a fault in the PCB. Check the gas supply and the ignition status, but if everything is correct, the PCB may be the culprit. |
| F.29 | Ignition fault of the burner | The burner does not ignite after five attempts, indicating a problem in the ignition process. Make sure that gas is reaching properly and that there are no obstructions, but if everything seems correct, the PCB could be the cause of the problem. |
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 05724800 PCB.
- Catalogue reference
- 05724800
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 3 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.
- Fuse
- 125 mA T (time-delay action)
- Integrated transformer
- Myrra, CE marked, terminals F/N/D
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval F 28 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 05724800
What fuse does the PCB of the Saunier Duval Isomax F 28E use?
What transformer does this PCB Ref. 05724800 use?
In which Saunier Duval boilers can I install the PCB 05724800?
Spare parts related to Saunier Duval Isofast
