Ferroli Bluehelix PRO S 27C Honeywell PCB Ref. 39845844
Control PCB for Ferroli Bluehelix and Twist Pro boilers, ref. 39845844. Manufactured by Honeywell (silkscreen logo on the board, mirrored) and includes a Honeywell S4962V3182V01 ignition control module. It is replaced when the boiler fails to ignite or the ignition module stops functioning properly.
VAT included
Consult via WhatsAppFerroli boilers compatible with reference 39845844
PCB with reference 39845844. Six confirmed compatibilities: Bluehelix PRO S 27C and Bluehelix PRO 25C.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ferroli Bluehelix PRO S 27C | Bluehelix PRO S | Contrasted |
| Ferroli Bluehelix PRO 25C | Bluehelix PRO | Contrasted |
| Ferroli Bluehelix PRO 32C | Bluehelix PRO | Contrasted |
| Ferroli Bluehelix PRO 35C | Bluehelix PRO | Contrasted |
| Ferroli Bluehelix TECH 25C | Bluehelix TECH | Contrasted |
| Ferroli Bluehelix TECH 35C | Bluehelix TECH | 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 39845844 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 39845844. 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 39845844 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 ignite: it tries to start but the flame does not catch.
Cause: The ignition module integrated into the PCB generates and controls the ignition spark; if it fails, there is no flame even though the rest of the system operates.
Check if there is any spark or sound from the burner during the ignition attempt; if there is no spark at all, the fault is more likely related to the ignition module.
- 02
It locks up just after trying to ignite, with a fault code for ignition on the display.
Cause: The ignition module does not confirm the flame within the safety time and the PCB interrupts the process.
Check that gas is properly reaching the boiler (other gas appliances in the house are working) before assuming it is the ignition module.
- 03
It sometimes turns on and sometimes does not, in an irregular manner.
Cause: An intermittent fault of the ignition module within the PCB causes spark inconsistently.
Test several consecutive starts and note how many out of every ten fail; a repeated fault pattern supports the diagnosis of the PCB more than an sporadic one.
- 04
An error appears on the display directly related to the ignition.
Cause: The electronics register that the ignition cycle did not complete correctly and display it as a warning.
Note the exact fault code: in many cases, this warning may also be due to a dirty or improperly positioned ignition electrode; check it before replacing the PCB.
Fault codes for Ferroli that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| A02 | Flame signal present with burner off. | The flame detection circuit on the PCB can falsify the ionisation signal; after checking the electrode, ground, and wiring, if everything is correct, check/replace the PCB. |
| A61 | ABM03 control board anomaly (internal error). | Internal fault of the ABM03 module integrated in the PCB; check the grounding and power supply, and if it persists, replace the control board/PCB. |
| A63 | ABM03 control board anomaly (internal error). | Internal fault of the ABM03 module in the PCB; check earth/power supply and, if the error persists, replace the control board/PCB. |
| F64 | ABM03 control board anomaly (internal error). | Internal error of the ABM03 controller on the PCB; check grounding/network noise and, if it persists, replace the PCB. |
| A65 | ABM03 control board anomaly (internal error). | Internal fault of the ABM03 module in the PCB; confirm grounding/good power supply and replace the control board/PCB if not corrected. |
| F66 | ABM03 control board anomaly (internal error). | Internal fault of the ABM03 control board integrated in the PCB; if it persists after checking the ground and power supply, replace the PCB. |
| A23 | Anomaly in the parameters of the control board. | PCB parameters misconfigured/corrupted; check and reprogram from service menu/tool, and if it doesn't save, replace the PCB. |
| A24 | Anomaly in the parameters of the control board. | Configuration/firmware of the PCB with incorrect parameters; check/load correct values and, if it fails, replace the PCB. |
| F20 | Anomaly in the parameters of the control board. | Parameters of the PCB altered; check with service tool and reprogram or replace PCB if it does not maintain configuration. |
| F21 | Anomaly in the parameters of the control board. | Parameterisation error in the PCB; reconfigure/load default settings and, if it reappears, defective PCB. |
| A26 | Anomaly in the parameters of the control board. | Parameters of the PCB incorrectly loaded; check with the technical menu and, if not corrected, replace the PCB. |
| F40 | Anomaly in the parameters of the control board. | PCB configuration values out of range/corrupt; reprogram and, if it persists, replace the PCB. |
| F47 | Anomaly in the parameters of the control board. | Incorrect internal parameters of the PCB; verify/load factory values and, if it persists, replace the 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 Ferroli 39845844 PCB.
- Catalogue reference
- 39845844
- Brand
- Ferroli
- 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.
- PCB manufacturer
- Honeywell
- PCB reference
- 39845844
- Ignition module code
- S4962V3182V01
- Batch/ignition module date
- 1801
- Ignition module software
- Sw: 86656-013
- Additional code ignition module
- Cd: ABM03D
- Code printed on the connector
- 5007518-004 / GM-15/13
- Fuse brand
- MERSEN
- Flammability classification of the laminate
- 94V-0
- A distributor mentions a substitute reference 39845845, but there is only one source: it is not included as a confirmed equivalent.
Frequently asked questions about the PCB 39845844
Is this PCB 39845844 manufactured by Ferroli or Honeywell?
For which models is the PCB 39845844 compatible?
What faults does this PCB solve for the Bluehelix PRO S 27C?
What ignition module does the PCB of the Bluehelix use?
What fuse does the PCB 39845844 use?
How many models are compatible with this PCB?
Spare parts related to Ferroli Bluehelix PRO
