Chaffoteaux MX2 24FF PCB Ref. 65100774
If your boiler does not start, locks out, or behaves erratically, you may need the Chaffoteaux MX2 24FF PCB, reference 65100774. This board is responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, you might see fault code 30, which indicates a communication fault with the main board. It is compatible with models such as the MX2 24 FF, MX2 30 FF, and also with the Compy MX2 range. It is recommended to replace it when it shows signs of malfunction.
Chaffoteaux boilers compatible with reference 65100774
PCB with reference 65100774. Four confirmed compatibilities: MX2 24 FF and MX2 30 FF.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Chaffoteaux MX2 24 FF | MX2 | Contrasted |
| Chaffoteaux MX2 30 FF | MX2 | Contrasted |
| Chaffoteaux Compy MX2 24 FF | Compy MX2 | Contrasted |
| Chaffoteaux Compy MX2 30 FF | Compy 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 ref. 65100774 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 65100774. 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 65100774 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 respond to any command, neither for heating nor for domestic hot water.
Cause: A fault in the PCB prevents the boiler from functioning properly.
Check if the boiler is receiving stable mains power and that the differential switch in the house is not tripping.
- 02
The boiler turns on by itself without anyone requesting heat.
Cause: A fault in the PCB keeps the ignition command active even when there is no actual demand.
Disconnect the room thermostat and check if the boiler continues to turn on by itself; this helps to rule out the thermostat.
- 03
A repeated 'click-click' relay sound is heard, and the boiler never starts.
Cause: The ignition relay on the PCB tries to close the contact but fails.
Listen to see if that click coincides with the fan or gas valve attempting to start before concluding it's the PCB.
- 04
After a power outage, the boiler stops working, even though it was working fine before.
Cause: The PCB does not complete its reset correctly after a power outage.
Cut the main power for 1-2 minutes and then restore power to force a complete reset before changing the PCB.
Fault codes Chaffoteaux that this part resolves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 30 | Communication fault with the main PCB. | The main PCB (65100774) does not establish communication with the panel/display, usually due to a fault in the PCB itself (5V/12V supply, micro or tracks). Check voltages at the display connector, continuity of the harness, and if they are correct, 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 Chaffoteaux 65100774 PCB.
- Catalogue reference
- 65100774
- Brand
- Chaffoteaux
- 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.
- voltage
- 250V
- current
- 10A
Frequently asked questions about the PCB 65100774
For which models is the Chaffoteaux MX2 24FF PCB (Ref. 65100774) compatible?
What fault codes are documented for this PCB?
Does this PCB work for the Chaffoteaux MX2 30 FF boiler?
Can I use this PCB in a Chaffoteaux Compy MX2 24 FF?
What is the reference of the PCB that I need?
Is this PCB suitable for a boiler from a different range that is not on the list?
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