PCB for Vaillant VM, VMI, and VMW Boilers
If your boiler does not start, locks up, or exhibits erratic behavior, a technical diagnosis must confirm if you need the PCB for Vaillant boilers VM, VMI, and VMW, reference 0020034604. 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 F.63, F.64, or F.65, which indicate issues with the configuration memory, electronics, or overheating. It is compatible with models such as VMW 240/2-3, VM 240/2-5, and VMI 280-7, among others. A technician must confirm through diagnosis if it needs to be replaced when the mentioned symptoms are detected.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 0020034604
- Warranty
- 1 year
Vaillant boilers compatible with reference 0020034604
PCB with reference 0020034604. 14 verified compatibilities: VMW 240/2-3 and VMW 240/2-3 R1.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VMW 240/2-3 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 240/2-3 R1 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 242/2-3 R1 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 242/2-3 R2 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 242-5 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 280/2-5 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VMW 282/2-5 | VMW (mixed turboTEC/turboMAX, wall-hung mixed) | Contrasted |
| Vaillant VM 240/2-5 | VM (heating only) | Contrasted |
| Vaillant VM 242/2-5 | VM (heating only) | Contrasted |
| Vaillant VM 280/2-5 | VM (heating only) | Contrasted |
| Vaillant VM 282/2-5 | VM (heating only) | Contrasted |
| Vaillant VM 202/2-5 | VM (heating only) | Contrasted |
| Vaillant VMI 280-7 | VMI (compact interior) | Contrasted |
| Vaillant VMI 282-7 | VMI (compact interior) | 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. 0020034604 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 0020034604. 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 0020034604
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 does not respond to any controls, as if it were without power.
Cause: If the secondary fuse blows, the PCB will be left without the 21V it needs to operate.
Before changing the PCB, measure the 1.25A fuse with the multimeter.
- 02
The display does not light up and there are no indicators on.
Cause: This is usually due to a blown fuse that protects the 21V transformer on the PCB.
Check the condition of the fuse visually or with a multimeter before replacing it.
- 03
A fault code for the PCB or general control appears on the display
Cause: The control electronics detect an internal fault and lock the unit instead of attempting to ignite it.
Note the exact code; some can be resolved with a reset and it is not necessary to change anything.
Vaillant fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.63 | EEPROM error: fault in the configuration memory of the boiler's electronics. | The EEPROM physically resides on this main PCB; if the memory becomes corrupted or fails, the cause is the board itself. Verify: after a reset, the code persists and, with correct connections and sensors, the fault reproduces; confirm replacement of the board. |
| F.64 | Electronics error / NTC: fault in the electronics or short circuit in the flow/return NTC sensors. | When a short circuit in the NTC is ruled out (by checking sensors and wiring with a multimeter), the fault in the electronics processing those signals points to this main PCB. Verify: NTC and connections are correct but the fault code persists after reset = defective PCB. |
| F.65 | Temperature error in the electronics: the PCB is overheating. | The temperature sensor of the electronics itself detects excess heat on the PCB; if an external heat source or lack of ventilation is ruled out, the origin is a defect in the PCB. Verify: normal environment/ventilation but the code repeats = faulty PCB. |
| F.61 | Fault in the regulation/activation of the gas valve: the electronics cannot control the gas valve. | The PCB is the one that controls the gas valve; with wiring to ground, short circuit, and the valve itself ruled out using a multimeter, the remaining documented cause is the PCB. Verify: wiring and valve coils are correct but the code persists = defective PCB (the PCB is one of the causes, not the only one). |
| F.62 | Gas valve error due to delayed shutdown: delayed disconnection of the gas valve detected. | The PCB manages the closing/timing of the valve and the electrode signal; with the valve and detection electrode ruled out, the control electronics defect points to this PCB. Verify: valve and electrode are correct but the code repeats = PCB (concurrent cause with valve/electrode). |
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 0020034604 PCB.
- Catalogue reference
- 0020034604
- Uniclima internal SKU
- PLCVUW240
- Brand
- Vaillant
- Type of part
- PCBs (control boards)
- Units in stock
- 5 units
- 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.
- Transformer supply voltage
- 230V 50-60Hz
- Secondary transformer voltage
- 21V
- Fuse
- T1.25A
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Vaillant VMW 242/2-3 R2 Manual (PDF) Document © Vaillant, provided as a technical reference.
Frequently asked questions about the PCB 0020034604
Is this PCB the same physical part as the one in the PLVMW24R listing for the Vaillant VMW 240/2-3?
Is this PCB Ref. PLCVUW240 suitable for the Vaillant VMI 282-7?
What fuse does this PCB use in the Vaillant VMW 240/2-3?
When is this PCB replaced in a Vaillant VMW 280/2-5?
How many boiler models are compatible with the PLCVUW240 control board?
What fault codes are compatible with this PCB?
Spare parts related to Vaillant VMW (combi turboTEC/turboMAX, wall-mounted combi)
