Ariston Microtec T2 LLS 23 MFFI PCB Ref. 65100248
The Ariston Microtec T2 LLS 23 MFFI PCB is the device that controls the ignition, burner modulation, pump, and safety features of the boiler. When this part fails, the boiler may not start, become locked, or operate erratically. Users may experience fault codes such as 301, 302, 303, 304, or 305. This board is compatible with models like Microtec 23 MFFI, T2 23 MFFI (LLS), Microtec 23 MI, and T2 23 MI, among others. It is recommended to replace it when these symptoms or errors are noticed.
Ariston boilers compatible with reference 65100248
PCB with reference 65100248. Four confirmed compatibilities: Microtec 23 MFFI and T2 23 MFFI (LLS).
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ariston Microtec 23 MFFI | Microtec / T2 (range 23 MFFI/MI) | Contrasted |
| Ariston T2 23 MFFI (LLS) | Microtec / T2 (range 23 MFFI/MI) | Contrasted |
| Ariston Microtec 23 MI | Microtec / T2 (range 23 MFFI/MI) | Contrasted |
| Ariston T2 23 MI | Microtec / T2 (range 23 MFFI/MI) | 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. 65100248 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 65100248. 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 65100248 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 shows no signs of life when receiving power.
Cause: The protection fuse on the PCB may have blown and is cutting off power to the entire circuit.
Visually inspect the fuse on the PCB; it's a quick and inexpensive check before replacing the entire board.
- 02
A fixed fault code appears and the boiler locks out as soon as you try.
Cause: The electronics cut off the start-up upon detecting an out-of-range safety condition.
Note the exact fault code and try a reset; if it reappears the same, point to the PCB.
- 03
The boiler turns on and off by itself after a few minutes, repeatedly.
Cause: The PCB loses the signal from a sensor or the flame and interrupts the cycle for safety.
Check that the connectors for sensors and electrodes are properly seated before replacing them.
- 04
The display or the control do not respond to any button presses.
Cause: The microcontroller on the PCB stops processing the keypad signals.
Try disconnecting and reconnecting the display connector before replacing the entire PCB.
Fault codes for Ariston that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 301 | EEPROM/display error (internal electronic memory). | PCB fault (EEPROM corruption or logic/power failure of the PCB) prevents reading the memory; check 5V/12V voltages on the board, connectors/display and, if possible, test/replace the PCB. |
| 302 | Communication error main PCB–display/interface. | The PCB fails in the data bus with the display/interface (fault in the PCB or its power/signal); check the harness and connectors, continuity and voltages, and signal oscillation between boards; if it persists, replace the PCB. |
| 303 | Main PCB error. | Internal fault of the PCB (microcontroller, primary power supply, or logic); check stabilization of 5V/12V, inspect components/relays, and, as a conclusive test, replacement/testing of the board. |
| 304 | Too many resets (>5 in 15 minutes). | Repeated resets originating from the control board itself (watchdog/power drops of the PCB); check the PCB power supply for ripple/drops, connections, and conditions causing reset; if installation is ruled out, replace the PCB. |
| 305 | Main PCB fault (variant). | Internal anomaly of the PCB (control/power); check logical voltages, relays, and tracks; confirmation by replacing the board. |
| 306 | Main PCB fault (variant). | Internal fault of the PCB that blocks the logic; check power supply and internal communication; if there are no other external causes, replace the PCB. |
| 307 | Main PCB fault (variant). | Internal fault of the PCB; check control lines and internal sources; definitive diagnosis by PCB exchange. |
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 65100248
- Catalogue reference
- 65100248
- Brand
- Ariston
- Type of part
- PCBs (control boards)
- Units in stock
- 0 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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.
- Firmware version (chip)
- SW-3.0
- Fuse selector (jumper)
- FAST FUSE / ON / OFF
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Ariston T2/23 MI Manual (PDF)Document © Ariston, provided as a technical reference.
Frequently asked questions about the PCB 65100248
Is this PCB Ref. 65100248 compatible with the Ariston Microtec 23 MFFI?
Does the PCB Ref. 65100248 work for the Ariston T2 23 MFFI (LLS)?
What firmware versions does the PCB of the Ariston Microtec T2 LLS 23 MFFI have?
How many models are compatible with the PCB Ref. 65100248?
What fault codes are documented for this PCB?
Does the reference PLCT2LLSX correspond to this PCB?
Spare parts related to Ariston Microtec / T2 (range 23 MFFI/MI)
