PCB Vaillant Turbomag Plus MAG ES PT 11 2 0 5 H R2 Ref. 0020251359
The Vaillant Turbomag Plus MAG ES PT 11 2 0 5 H R2 control PCB is a fundamental component that regulates the ignition, burner modulation, pump, and safety features of the boiler. If it malfunctions, the boiler may fail to start, lock out, or behave erratically. This PCB is compatible with several models, including the MAG ES/PT 11-2/0, MAG 11-2-0-5 R1, and MAG 16-2-0-5 R2, among others. It is advisable to replace it when errors such as F.20, F.27, or F.37 are detected.
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Consult via WhatsAppVaillant boilers compatible with reference 0020251359
PCB with reference 0020251359. 11 verified compatibilities: MAG ES/PT 11-2/0 and MAG 11-2-0-5 R1.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant MAG ES/PT 11-2/0 | MAG ES/PT 11-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 11-2-0-5 R1 | MAG ES/PT 11-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 11-2-0-5 R2 | MAG ES/PT 11-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG ES/PT 14-2/0 | MAG ES/PT 14-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 14-2/0 H R1 | MAG ES/PT 14-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 14-2-0-5 | MAG ES/PT 14-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 14-2-0-5 R1 | MAG ES/PT 14-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 14-2-0-5 R2 | MAG ES/PT 14-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 16-2-0-5 | MAG ES/PT 16-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 16-2-0-5 R1 | MAG ES/PT 16-2/0 (TurboMAG) | Contrasted |
| Vaillant MAG 16-2-0-5 R2 | MAG ES/PT 16-2/0 (TurboMAG) | 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. 0020251359 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 0020251359. If it is not visible, do not identify the part by 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 0020251359 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 doesn't turn on at all: no pilot light, no beep, nothing at all.
Cause: The PCB is not supplying power correctly to the other components.
Check that the fuse on the PCB is not blown before replacing it completely.
- 02
Cold or lukewarm water comes out because the burner does not ignite, even though the tap is opened.
Cause: The PCB does not send the ignition command to the gas valve.
Check that there is good water pressure and flow, as a flow fault can prevent ignition.
- 03
The fault indicator flashes with a fixed code every time an attempt is made to use domestic hot water.
Cause: The PCB detects a fault and blocks the ignition to prevent dry firing attempts.
Note the number of blinks or the code and compare it with the fault table before deciding that it is the PCB.
- 04
The relays on the PCB click but the burner does not ignite.
Cause: The relay works, but it does not send the complete signal to the gas valve.
Check that the connectors between the PCB and the gas valve are properly tightened and free of oxidation.
Fault codes from Vaillant that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.20 | Safety temperature limiter disconnection. | The PCB may incorrectly interpret/manage the input from the limiter (thermal fuse) and trigger the safety. Check by bridging the limiter according to the manual and, if the wiring/sensor are OK, measure the input on the board or replace the PCB. |
| F.27 | Safety lockout flame simulation. | Moisture/damage in the PCB electronics can simulate an ionization signal. Check by drying, checking continuity/voltages of the board and the electrode; if it persists, replace the PCB. |
| F.37 | Fan speed difference fault. | The PCB powers and reads the fan (power/PWM and tach signal); a driver fault or reading on the board triggers the code. Check 12 V/PWM and speed signal at the board connectors (e.g., X30/X91) and, if the fan/harness are fine, replace the PCB. |
| F.57 | Measurement program fault. | Internal electronic error; if it persists after a reset, the PCB is defective. Check supply voltages and continuity; replace the PCB if it does not start. |
| F.63 | EEPROM fault. | Corrupted/damaged EEPROM memory of the PCB. Check reset and power supply stability; if the fault persists, replace the PCB. |
| F.166 | Communication fault. | Fault in the communication electronics of the PCB (e.g., bus/display). After ruling out interruptions in the harness, levels, and connectors, replace the PCB. |
| F.168 | Fault in the water escape sensor. | The analogue input on the PCB may fail and incorrectly detect a leak. If the sensor/wiring are OK or bridging the sensor makes it disappear, replace the PCB. |
| F.171 | Fault: fan. | The PCB controls the power/control of the fan; a faulty driver/power supply on the board causes the code. Check 12 V and control signal from the PCB before replacing it. |
| F.197 | Supervision protection fault. | Fault in the control/monitoring electronics on the PCB. If the appliance does not start after a reset, replace the board according to the manual. |
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 PCB Vaillant 0020251359
- Catalogue reference
- 0020251359
- Brand
- Vaillant
- 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.
- Visible components on the PCB
- Transformer, relays, and capacitors
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Vaillant MAG ES/PT 11-2/0 Manual (PDF)Document © Vaillant, provided as a technical reference.
Frequently asked questions about the PCB 0020251359
Is this PCB Ref. 0020251359 suitable for my Vaillant MAG 14-2/0-5?
Is this PCB suitable for a Vaillant OutsideMag IT 16-5/1-5 BETEV?
Spare parts related to Vaillant MAG ES/PT 14-2/0 (TurboMAG)
