Honeywell Control PCB Ferroli Econcept Tech Ref. 39821523
Control module manufactured by Honeywell (PCB code DBM04C, adhesive code S4962V2001, software revision R268G), identified by the side logo on the label. It incorporates power relays marked 'FT' (F3AA024E and F3AA010E). It is the control board for Ferroli boilers from the Econcept and Optimax HE range; it should be checked when the electronic control of the boiler fails. Replacement requires a technical diagnosis.
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 pump, gas valve, or ignition does not start, but the rest of the boiler works well.
Cause: The power relay on the PCB does not close the contact and is not receiving current.
Before changing the PCB, measure if there is power at the output of the corresponding relay when the boiler needs that component.
- 02
The boiler does not ignite and locks out when trying to start, without giving any more time.
Cause: The PCB does not complete the startup sequence because its control stage has failed.
Check that the fuse on the PCB is in good condition and that 230V is reaching it before considering it faulty.
- 03
The remote control or the panel are not responding, although the boiler seems to be receiving power.
Cause: The PCB manages communication with the control unit, and if its control stage fails, the connection is lost.
Disconnect and reconnect the bus connector of the control: a poor connection can produce the same symptom without the PCB being damaged.
- 04
The boiler works for a while and then locks out without a clear pattern.
Cause: An intermittent fault in the PCB causes it to lose control of the ignition sequence or modulation.
Note when it gets blocked (when requesting domestic hot water, heating, or when starting the burner) to rule out that it is another component before changing 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
- PLFE014
- Brand
- Ferroli
- Type of part
- PCBs (control boards)
- Units in stock
- 5 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.
- adhesive module code
- S4962V2001 1211
- software review
- R268G
- internal code (Cd)
- 34608003-03
- base model PCB
- DBM04C
- silkscreen code on PCB edge
- 45007787-004
- power relays
- brand 'FT', references F3AA024E (24V=DC coil) and F3AA010E
- visible batch code
- 1211
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
Who manufactures the control board of the Ferroli Econcept Tech 25C?
Does this PCB work for a Ferroli Econcept Tech Micro 25C?
What code on the label confirms that this PCB is for my Domicompact F24?
What software version does the PCB of the Domicompact F24 come with?
What fault codes are documented for the Honeywell Ferroli Econcept control board Ref. 39821523?
How many models are compatible with the Honeywell Ferroli Econcept Tech control board Ref. 39821523?
Spare parts related to Ferroli Econcept Tech
