PCB for EST 23 MI / Microgenus 23 MFFI / TX 27 MFFI Ref. 65101374
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the PCB for EST 23 MI / Microgenus 23 MFFI / TX 27 MFFI. This control board is responsible for managing the ignition, burner modulation, pump, and safety features of the boiler. When it fails, you might see fault codes such as 301, 303, 305, 306, or 307. It is compatible with models like TX 23 MFFI, TX 23 MI, and TEC IN 23 MFFI, among others. It should be replaced when these symptoms or errors occur on the main board.
VAT included
Consult via WhatsAppAriston boilers compatible with reference 65101374
PCB with reference 65101374. Eight confirmed compatibilities: Desy + 24 CA CPR and Desy + 24 CS CPR.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ariston Desy + 24 CA CPR | Ecoflam Desy + 24 | Contrasted |
| Ariston Desy + 24 CS CPR | Ecoflam Desy + 24 | Contrasted |
| Ariston TX 23 MFFI | Ariston (compatible range) | Contrasted |
| Ariston TX 23 MI | Ariston (compatible range) | Contrasted |
| Ariston EST 23 MI | Ariston (compatible range) | Contrasted |
| Ariston EST IN 23 MCSI | Ariston (compatible range) | Contrasted |
| Ariston TEC IN 23 MFFI | Ariston (compatible range) | Contrasted |
| Ariston Microgenus 23 MFFI | Ariston (compatible range) | 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. 65101374 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 65101374. 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 65101374 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 panel does not respond to any button, not even to turn off or reset.
Cause: The microcontroller on the PCB is not running the control program, so there is no response to any command.
Check if the display lights up, even partially; if it doesn't, measure the input power before replacing the PCB.
- 02
An error code appears that does not match any component you have checked.
Cause: The firmware version of the PCB interprets a reading incorrectly and generates a lockout that does not reflect the actual fault.
Compare the exact code with the error table in the manual for your specific model before ruling out sensors or the burner itself.
- 03
The boiler resets itself or the indicators flash without you having touched anything.
Cause: An internal fault in the PCB causes micro interruptions that reset the control cycle.
Observe if the reset always occurs at the same point in the cycle (when the fan turns on, when the gas opens); this helps to distinguish the PCB from another component.
- 04
It requests heat but the burner doesn't even attempt to ignite, you can't hear the fan or the spark.
Cause: The PCB is not sending the start command to the outputs, even though it receives the demand.
Check that the thermostat or the panel is actually requesting heat (the signal is reaching the PCB) before assuming that the fault is with the PCB.
Fault codes for Ariston that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 301 | EEPROM error (internal electronic part). | The EEPROM memory of the main PCB is corrupted/damaged; check the 230 V power supply and 5/3.3 V voltages on the PCB and bus/display connections; if reprogramming is not possible or the fault persists, replace the PCB. |
| 303 | Main PCB fault (internal electronic part). | Self-diagnosis detects an internal fault in the main PCB; check the network/ground, connectors, and absence of shorts in the PCB; if everything is correct and the code repeats, the cause is the PCB and it must be replaced. |
| 305 | Main PCB fault (internal electronic part). | Main PCB fault with lockout; after checking power supply, wiring, and connectors, if there are no other causes (peripherals/bus), the board is responsible and must be replaced. |
| 306 | Main PCB fault (internal electronic part). | Internal fault recognized by the self-diagnosis on the PCB; confirm voltages and continuity of harnesses, and if there are no external anomalies, replace the PCB. |
| 307 | Main PCB fault (internal electronic part). | Internal fault of the main PCB; if the bus and peripherals are correct, the origin is the PCB itself and it should be replaced. |
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 Ariston PCB 65101374
- Catalogue reference
- 65101374
- Brand
- Ariston
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- Hardware firmware version
- SW-3.0
- 'SW-3.0' is a firmware or hardware version mark read on the PCB, not a manufacturer code or a part reference.
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Ariston TX 23 MI Manual (PDF)Document © Ariston, provided as a technical reference.
Frequently asked questions about the PCB 65101374
What does 'SW-3.0' printed on this PCB mean?
Is this PCB suitable for the TX 27 MFFI?
Spare parts related to Ariston Ariston (compatible range)
