PCB Saunier Duval Isomax F 35 H MOD Ref. 0020048284
The Saunier Duval Isomax F 35 H MOD PCB Ref. 0020048284 is a component that controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, become locked, or operate erratically, displaying fault codes such as 13 or 20. This PCB is compatible with models from the Isomax range, such as the Isomax F 35 H-MOD, and can also be found in boilers from the Isotwin range, among others. It is recommended to replace it when the mentioned symptoms are detected or when receiving the associated fault codes.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020048284
PCB with reference 0020048284. Three confirmed compatibilities: Isomax F 35 H-MOD and Isotwin C 25 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isomax F 35 H-MOD | Isomax | Contrasted |
| Saunier Duval Isotwin C 25 E | Isotwin | Contrasted |
| Saunier Duval Isotwin C 30 E | 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 the reference 0020048284 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 0020048284. 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 0020048284 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 to any commands, neither from the panel nor from the thermostat.
Cause: The PCB executes the commands for ignition and regulation; if it fails, the boiler does not operate.
Confirm that power is reaching the boiler and that the fuse on the PCB is in good condition.
- 02
The boiler stops on its own during operation and needs to be reset to start again.
Cause: The PCB commands the safety shutdowns when it detects anomalies in its control circuits.
Note when it stops, during startup, modulation, or with hot water, to identify which area of the circuit may be failing before replacing it.
- 03
An error code appears on the display that does not match any known fault in the manual.
Cause: An internal fault in the PCB can generate erroneous fault codes by not correctly interpreting the signal from its sensors.
Reset the boiler once or twice and check if the fault code repeats: if it changes each time, it is more likely to be a fault with the PCB than with a specific component.
- 04
Communication between the control and the boiler has been lost, or the buttons do nothing.
Cause: The PCB manages the communication between the control panel and the rest of the boiler.
Turn off and on the boiler from the main switch, not just from the panel, and wait a minute before ruling out the PCB.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 13 | Main PCB fault. | Fault in the main PCB or its connections causes loss of control/readings. Check power supply and wiring harness, connections with the panel/interface; if it persists, test or replace the PCB. |
| 20 | Communication/compatibility fault between user interface and main circuit (software/coding). | After replacement or misalignment, the PCB and the display do not share the product code or protocol; the PCB locks the equipment. Verify product and bus coding (MMI/eBUS), check wiring, and if not corrected by reprogramming, replace the PCB or interface. |
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 0020048284
- Catalogue reference
- 0020048284
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 2 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Isomax F 35 H-MOD Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020048284
Does this PCB fit a Saunier Duval Isotwin C 25 E?
What function does this PCB serve in the Saunier Duval Isomax F 35 H MOD?
Spare parts related to Saunier Duval Isotwin
