Ferroli Econcept Tech 35C PCB Ref. 39821523
In the Ferroli boilers of the Econcept Tech range, the Ferroli Econcept Tech 35C PCB acts as the brain of the system, controlling the ignition, burner modulation, pump, and safety features. If this part fails, you will notice that the boiler does not start, locks out, or exhibits erratic behavior. It is compatible with models such as Econcept Tech 25C, Econcept Tech Micro 25C, and Domicompact F24, among others. A technician must confirm through diagnosis whether it needs to be replaced when these symptoms occur or when the fault codes A23, A24, A26, A61, or A63 appear.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 39821523
- Warranty
- 1 year
Ferroli boilers compatible with reference 39821523
PCB with reference 39821523. Five confirmed compatibilities: Econcept Tech 25C and Econcept Tech 35C.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ferroli Econcept Tech 25C | Econcept Tech | Contrasted |
| Ferroli Econcept Tech 35C | Econcept Tech | Contrasted |
| Ferroli Econcept Tech Micro 25C | Econcept Tech | Contrasted |
| Ferroli Econcept Tech Micro 35C | Econcept Tech | Contrasted |
| Ferroli Domicompact F24 | Domicompact | 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. 39821523 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 39821523. 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 39821523
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 start and there are no signs of power on the display.
Cause: The PCB is not receiving the correct 230V/50Hz power supply it needs to operate.
Check the mains voltage at the boiler terminal and the fuse on the PCB before replacing it.
- 02
A specific fault code appears and the boiler locks out without starting.
Cause: The PCB detects an out-of-range value in a sensor or pressure switch and cuts off the ignition.
Note the code and check the component it indicates first before declaring the PCB faulty.
- 03
The boiler operates irregularly, sometimes working well and other times not responding.
Cause: It is an intermittent fault in the control electronics, typical when the PCB (control board) heats up.
Observe if the fault occurs more with the boiler hot, it is an indication of a thermal fault in the PCB.
- 04
The domestic hot water or heating does not start even though there is demand.
Cause: The PCB does not manage the ignition command despite receiving the heating request.
Check that the thermostat and the communication bus are properly connected before replacing the PCB.
Ferroli fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| A23 | Anomaly in the control board parameters (misconfigured/corrupt PCB parameter). | The control board itself loses or corrupts its factory internal parameters, so the board is the documented cause; it is verified by re-entering/checking the board parameter, and if it reappears after reconfiguring, a technician must confirm whether it is necessary to replace the board. |
| A24 | Anomaly in the control board parameters (misconfigured/corrupt PCB parameter). | Same family as A23: the main PCB does not validate its own internal parameters; the board parameter is checked/reconfigured and, if it persists, the PCB is the part to be replaced. |
| A26 | Anomaly in the control board parameters (misconfigured/corrupt PCB parameter). | Indicate incorrect internal configuration/parameter of the PCB; the PCB is the component involved. The board parameter is checked, and if it is not resolved by reconfiguring, the PCB is replaced. |
| A61 | ABM03 controller fault (internal error of the control unit/main PCB). | It is an internal error of the control electronics itself (ABM03 PCB), not of an external sensor; the grounding is checked, and if it reappears, the documented solution is to replace the PCB/controller. |
| A63 | ABM03 controller fault (internal error of the control unit/main PCB). | 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. |
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 Ferroli PCB 39821523
- Catalogue reference
- 39821523
- Uniclima internal SKU
- PLFE033
- Brand
- Ferroli
- 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.
- Voltage / Frequency
- 230V / 50Hz
- PCB model
- DIMS23-FE01
- CE registration
- 51BN2209
- Thermal class
- Ta 2 Ts 3
- Transformer model
- DBM04C
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Ferroli Econcept Tech Micro 35C Manual (PDF) Document © Ferroli, provided as a technical reference.
Frequently asked questions about the PCB 39821523
What voltage and frequency does this PCB work at in the Econcept In 25C?
Does this PCB fit an Econcept Tech Micro 35C?
What thermal class does this PCB have for the Econcept Tech 25A?
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