Honeywell PCB for Altais 24/24 F
The Honeywell control PCB for Altais 24/24 F manages the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, lock out, or behave erratically, potentially displaying fault codes E98 or E99. This PCB is compatible with models from the Baxi Roca Altais range, such as the Altais 24/24 F and the Altais 24/24, among others. It should be replaced when it shows operational faults or communication errors.
Baxi Roca boilers compatible with reference 125568023
PCB with reference 125568023. Two confirmed compatibilities: Altais 24/24 F and Altais 24/24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca Altais 24/24 F | Baxi Roca Altais | Contrasted |
| Baxi Roca Altais 24/24 | Baxi Roca Altais | 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 125568023 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 125568023. 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 125568023 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 doesn't light up any indicator, it's completely dead.
Cause: The transformer that powers the PCB or the internal fuse has stopped supplying current to the control electronics.
Measure with a multimeter that 230V is reaching the input of the PCB and check if the fuse is blown or blackened before replacing it.
- 02
Different fault codes appear each time, with no apparent relation between them.
Cause: The control electronics misinterpret the signals from the sensors and generate lockouts that do not correspond to a real fault in those components.
Note the codes that appear and at what moment in the cycle they occur, and disregard the NTC and pressure switch while measuring their continuity.
- 03
The remote control or the thermostat cannot get the boiler to start, as if it doesn't hear it.
Cause: The microprocessor on the PCB manages communication with the thermostat and, if it fails, ignores the ignition requests.
Check that the thermostat is powered and that the wiring is securely connected to the terminals of the PCB before replacing it.
- 04
The boiler ignites, runs for a few minutes, and stops on its own for no apparent reason.
Cause: An intermittent fault in the PCB, such as a cold solder joint that opens when heated, causes it to lose the signal from a sensor and shut down for safety.
Check if the shutdown always occurs after the boiler has been running for a while and verify that the connectors on the PCB are not loose.
Fault codes for Baxi Roca that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| E98 | Communication fault between micros or PCB error, reset. | Internal fault or misconfiguration of the PCB interrupts communication between microcontrollers; check polarity/grounding, voltages, and wiring, reset, and if the issue persists while isolating peripherals, replace the PCB. |
| E99 | Communication fault between micros or PCB error, reset. | Fault in the control board that interrupts internal communication (micros/bus); check power supply, ground connections, and connectors, and if after reset and elimination of peripherals the fault persists, replace the board. |
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 Baxi Roca PCB 125568023
- Catalogue reference
- 125568023
- Brand
- Baxi Roca
- Type of part
- PCBs (control boards)
- Units in stock
- 0 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.
- Manufacturer (printed logo, cells 732 and 733)
- Honeywell
- Type of PCB
- SMCOM02
- Internal code / software
- Sw R196C 054943, Date 8386, Cd. 99 S163.1
- Transformer
- Electron-Coil ERBA/C24 (Italy), ref. A0485033FA, 420/05, CE B39880-C120-A70
Frequently asked questions about the PCB 125568023
Is this Honeywell PCB compatible with the Baxi Roca Altais 24/24 F?
What transformer does the PCB of the Altais 24/24 F use?
Spare parts related to Baxi Roca Altais
