Chaffoteaux Minima MX2 24 FF / 30 FF PCB - Marking R7425
If your boiler does not start, locks up, or exhibits erratic behavior, a technical diagnosis must confirm if you need the Chaffoteaux Minima MX2 24 FF / 30 FF PCB, marked R7425. This control board is responsible for managing the ignition, burner modulation, pump, and safety features of the boiler. When it fails, you may notice faults such as 40-50-60-70-80, which indicate a communication defect with the display. It is compatible with the MX2 24FF and MX2 30FF models from the Chaffoteaux Minima MX2 range, among others. A technician must confirm through diagnosis if it needs to be replaced when the mentioned symptoms appear.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 61400240
- Warranty
- 1 year
Chaffoteaux boilers compatible with reference 61400240
PCB with reference 61400240. Two confirmed compatibilities: MX2 24FF and MX2 30FF.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Chaffoteaux MX2 24FF | Chaffoteaux Minima MX2 | Contrasted |
| Chaffoteaux MX2 30FF | Chaffoteaux Minima MX2 | 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 ref. 61400240 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 61400240. 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 61400240
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 ignites, but the flame fluctuates without reason and does not stabilize.
Cause: The adjustment potentiometers on the PCB are damaged or dirty, causing an unstable signal to the burner.
Before changing the PCB, slightly move the power adjustment knob; if the flame reacts to the touch, it may be the potentiometer, not the entire board.
- 02
Boiler completely off, with no display or any LED lit.
Cause: The internal power supply of the PCB has failed and there is no power reaching the rest of the circuits.
Check that there is 230V at the input of the PCB and that the main fuse of the house has not blown.
- 03
A fault code appears that does not clear even after resetting multiple times.
Cause: The PCB maintains the lock because its safety logic detects a condition that does not resolve itself.
Check the meaning of the code in the manual for the model and first rule out the external components that the code indicates.
- 04
The domestic hot water or heating does not start even though the boiler seems to be on.
Cause: The PCB is not sending the opening command to the corresponding outlet due to a fault in its control stage.
Check if the problem is only in domestic hot water, only in heating, or in both: if it is only in one function, it could be the gas valve or the sensor of that function and not the PCB.
Chaffoteaux fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 40-50-60-70-80 | Communication fault with the display PCB (control board/display module). | 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 Chaffoteaux 61400240 PCB.
- Catalogue reference
- 61400240
- Uniclima internal SKU
- MODCH24FF
- Brand
- Chaffoteaux
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- Silkscreen printing on PCB
- R7425
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Chaffoteaux MX2 24FF Manual (PDF) Document © Chaffoteaux, provided as a technical reference.
Frequently asked questions about the PCB 61400240
What marking does the PCB of the Chaffoteaux Minima MX2 24 FF have?
Is this PCB compatible with the Chaffoteaux Minima MX2 30 FF?
How many models are compatible with this PCB?
What fault codes are documented for this PCB?
What is the reference for this PCB?
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