Saunier Duval Isomax F35 H MOD PCB Cod. 0020028314-4
When you open the hot water tap, the PCB Saunier Duval Isomax F35 H MOD Cod. 0020028314-4 is responsible for managing the ignition and modulation of the burner, as well as the operation of the pump and the safety features of the boiler. If this part fails, you will notice that the boiler does not start, locks out, or behaves erratically, potentially displaying faults such as 12, 18, or 20. It is compatible with the Saunier Duval Isomax F35 H MOD model, among others. A technician should assess the replacement through diagnosis when you experience these operational issues.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 0020048285
- Warranty
- 1 year
Saunier Duval boilers compatible with reference 0020048285
PCB with reference 0020048285. A proven compatibility: Duval Isomax F35 H MOD.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Duval Isomax F35 H MOD | Saunier | 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 0020048285 is the part for your boiler.
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 0020048285. 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 that require diagnosis on the PCB 0020048285
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 and there are no lights on.
Cause: a damaged PCB prevents other components from receiving power
check the fuses on the PCB and verify that power is reaching it before replacing it
- 02
An error code appears on the screen and the boiler does not start.
Cause: the PCB stops operation upon detecting an incorrect safety signal
note the code that appears and check it in the manual: the problem may be with a sensor and not with the PCB
- 03
The remote control does not change the temperature or the mode of the boiler.
Cause: the PCB does not process the commands from the remote correctly
check the wiring and the connector of the remote control before blaming the PCB
- 04
The boiler starts and stops repeatedly.
Cause: faults in the electronics of the PCB cause intermittent cuts
first check a faulty pressure switch or sensor: they are cheaper to test and can produce the same symptom
- 05
The reference of your PCB does not completely match what was expected.
Cause: this model has had several versions of the PCB with different codes depending on the production batch
Take a photo of the complete silkscreen of your PCB, on both sides, and compare it with the datasheet before confirming the purchase.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 12 | Communication error between interface circuit and main circuit. | The auxiliary interface PCB does not send/receive the signal to the main PCB (communication fault). Check the 5 V power supply to the display and continuity of the harness/connectors; if the issue persists, replace the interface PCB. |
| 18 | User interface fault. | This symptom may be related to the part, but it does not confirm that it is faulty. A technician must check the equipment and its inspection according to the manual before deciding on a repair or replacement. |
| 20 | Software interface incompatible with IRIS software. | User interface not compatible or incorrectly coded with respect to the main PCB (typical after replacing the interface/PCB without adjusting the coding). Check version/coding and reprogram or install the correct interface PCB. |
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 0020048285.
- Catalogue reference
- 0020048285
- Uniclima internal SKU
- PLAXIF35H
- 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
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Silkscreen code (component side)
- 0020028314-4
- PCB code (rear side)
- 0020028315
- Review index
- Ind 3
Frequently asked questions about the PCB 0020048285
What code is on the back of this PCB?
What is the revision index of this PCB?
What exact boiler is this PCB Cod. 0020028314-4 compatible with?
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