Vaillant PCB VMW 296/3-5
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the Vaillant PCB VMW 296/3-5, reference 0020092478. This control board regulates the ignition, burner modulation, pump, and safety features of the boiler. The fault codes F.61, F.62, F.63, F.64, and F.65 indicate problems with this part. It is compatible with models from the ecoTEC plus VMW and VM ranges, such as the VMW 296/3-5 and the VM 246/3-5, among others. You should replace it when you experience faults in the operation of the boiler.
VAT included
Consult via WhatsAppVaillant boilers compatible with reference 0020092478
PCB with reference 0020092478. 11 verified compatibilities: VMW 296/3-5 and VMW 296/3-5 R3.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VMW 296/3-5 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VMW 296/3-5 R3 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VMW 296/3-5 R5 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VMW 346/3-5 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VMW 346/3-5 R3 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VMW 346/3-5 R5 | ecoTEC plus VMW (combi) | Contrasted |
| Vaillant VM 246/3-5 | ecoTEC plus VM (heating only) | Contrasted |
| Vaillant VM 246/3-5 R3 | ecoTEC plus VM (heating only) | Contrasted |
| Vaillant VM 376/3-5 | ecoTEC plus VM (heating only) | Contrasted |
| Vaillant VM 376/3-5 R3 | ecoTEC plus VM (heating only) | Contrasted |
| Vaillant VM 376/3-5 R5 | ecoTEC plus VM (heating only) | 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. 0020092478 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 0020092478. 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 0020092478 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 start and no indicator lights are on.
Cause: The PCB is not receiving power, so it cannot start any cycle.
Check the fuse on the PCB and the input current before replacing it.
- 02
A different fault code appears every few days, not always the same one.
Cause: A deteriorating PCB often exhibits intermittent and varied faults.
Keep track of the codes that appear: if they vary significantly, it is more likely to be the PCB and not a specific sensor.
- 03
The boiler does not respond when the temperature is increased or decreased from the control.
Cause: The relay that manages the ignition command on the PCB may not be functioning properly.
Test if it responds to the action of the control directly from the boiler's control panel.
- 04
A clicking sound is heard on the PCB, but the boiler does not respond.
Cause: It is the typical sound of a worn mechanical relay that fails to close the contact.
Listen to see if the clicking coincides exactly with the moment you try to turn it on.
Fault codes from Vaillant that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.61 | Gas valve activation error | The driver/relay of the PCB does not activate the gas valve when there is a demand. Check the voltage at the terminals of the valve during the request; if the wiring and valve are correct and no stable command is received, the PCB is defective. |
| F.62 | Gas valve disconnection delay | The output from the PCB to the valve remains stuck or leaking (relay/power stage), keeping the valve energized after shutdown. Check that the voltage to the valve drops immediately when the flame ceases; if the voltage persists and the valve closes when manually de-energized, the PCB is the cause. |
| F.63 | Fault: EEPROM | Corruption/invalid reading of the EEPROM memory in the PCB. Check retry and power supply stability; if the fault persists, reprogram if applicable or replace the PCB. |
| F.64 | Electronic fault / NTC | Fault in the measurement circuit on the PCB interpreting a short circuit in the NTC even when correct. Check NTC resistances in the sensor and in the board connector; if readings are correct and the warning persists, the fault is in the analog input of the PCB. |
| F.65 | Fault: PCB temperature | The PCB detects internal overtemperature or its thermal sensor is damaged. Check for external thermal influence and ventilation; if the ambient temperature is normal and the issue persists, the electronics/PCB is faulty. |
| F.67 | Fault: electronics/flame | Fault in the flame evaluation electronics of the PCB (implausible ionization signal). Check electrode/cable and ionization current; if they are correct and still implausible, the detection stage in the PCB is faulty. |
| F.70 | Invalid appliance code (DSN) | Display and PCB have been replaced without reprogramming the DSN/coding, or the power coding of the board does not match. Check/adjust DSN in service menu and coding resistor; if not possible, install the correct PCB and parameterize. |
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 Vaillant PCB 0020092478.
- Catalogue reference
- 0020092478
- Brand
- Vaillant
- 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.
- PCB silk-screened code
- TL-AL
- manufacturer
- Vaillant
- Release code
- Z 10006
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Vaillant VMW 296/3-5 Manual (PDF)Document © Vaillant, provided as a technical reference.
Frequently asked questions about the PCB 0020092478
Does this PCB work for a Vaillant VM 376/3-5 R5?
Who manufactures the PCB of the Vaillant VMW 296/3-5?
What code is printed on the PCB of the VMW 346/3-5?
Is there a difference between the PCB of the VMW 296/3-5 and the VM 246/3-5 R3?
Spare parts related to Vaillant ecoTEC plus VMW (combi)
