Wolf CGB K 40-35 Control Board PCB Ref. 279925099
Wolf CGB K is the range of boilers where the Wolf CGB K 40-35 Control Board is installed. This board is responsible for controlling the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the user will notice that the boiler does not start, locks out, or exhibits erratic behavior. It is compatible with models such as CGB-11, CGB-20, and CGB-K-40/35, among others. It should be replaced when errors such as 30, 31, or 33 occur.
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Consult via WhatsAppWolf boilers compatible with reference 279925099
PCB with reference 279925099. 15 verified compatibilities: CGB-11 and CGB-20.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Wolf CGB-11 | CGB | Contrasted |
| Wolf CGB-20 | CGB | Contrasted |
| Wolf CGB-24 | CGB | Contrasted |
| Wolf CGB-35 | CGB | Contrasted |
| Wolf CGB-50 | CGB | Contrasted |
| Wolf CGB-75 | CGB | Contrasted |
| Wolf CGB-100 | CGB | Contrasted |
| Wolf CGB-K-20 | CGB-K | Contrasted |
| Wolf CGB-K-24 | CGB-K | Contrasted |
| Wolf CGB-K-40/35 | CGB-K | Contrasted |
| Wolf MGK-130 | MGK | Contrasted |
| Wolf MGK-170 | MGK | Contrasted |
| Wolf MGK-210 | MGK | Contrasted |
| Wolf MGK-250 | MGK | Contrasted |
| Wolf MGK-300 | MGK | 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. 279925099 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 279925099. 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 279925099 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 turns on and off at times that are not scheduled.
Cause: Fault in the clock or program management of the PCB.
Check that the time is set correctly and that there is no duplicate program before replacing it.
- 02
The boiler is completely stopped and there is neither domestic hot water nor heating.
Cause: The PCB does not start any cycle even though it is receiving a demand.
Check that power is reaching the PCB and that the main switch of the boiler is in the correct position.
- 03
The same fault code always appears when trying to start.
Cause: The PCB detects a persistent anomaly that may originate from an external component or from itself.
Note the code and check it in the manual before changing the PCB: many codes point to the sensor or pressure switch, not the electronics.
- 04
The heating works but there is no switch to domestic hot water when the tap is opened.
Cause: The output from the PCB that controls the three-way valve is not functioning.
First, check that the three-way valve physically moves when you open the tap before replacing the PCB.
Fault codes for Wolf that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 30 | Boiler PCB fault — EEPROM record "Condensing boiler" invalid. | The CRC/EEPROM record residing in the control board is corrupted; if the error persists after turning the power off/on, the control PCB is defective. Verify with a network reset and basic check of power supply and connectors; if it continues, replace the board. |
| 31 | Burner electronics error — Incorrect "Burner" EEPROM record. | The EEPROM record of the burner on the control board is invalid; if the network reset does not clear it, the memory of the PCB is damaged. Check with power off/on, and if it persists, replace the control board. |
| 33 | Error electronic values — EEprom record "General reset" invalid. | The default values stored in the EEPROM of the control board are corrupted, causing the boiler to lock with this code. The indicated check is to replace the control board (after ruling out a network fault). |
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 Wolf PCB 279925099
- Catalogue reference
- 279925099
- Brand
- Wolf
- 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
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Engraved marking on copper (back side)
- XM3S1 / 3-335369 / 18-07-02
- Relays
- 3, online
Frequently asked questions about the PCB 279925099
What does the code 'XM3S1 / 3-335369 / 18-07-02' engraved on the PCB of the Wolf CGB-K-40-35 indicate?
Is the spare part reference for this PCB of the Wolf CGB-K-40-35 confirmed?
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