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 board 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. A technician must confirm through diagnostics whether it needs to be replaced when errors such as F.20, F.27, or F.37 are detected.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 0020251359
- Warranty
- 1 year
Vaillant 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.
Verified compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant MAG ES/PT 11-2/0 | MAG ES/PT 11-2/0 (TurboMAG) | Verified |
| Vaillant MAG 11-2-0-5 R1 | MAG ES/PT 11-2/0 (TurboMAG) | Verified |
| Vaillant MAG 11-2-0-5 R2 | MAG ES/PT 11-2/0 (TurboMAG) | Verified |
| Vaillant MAG ES/PT 14-2/0 | MAG ES/PT 14-2/0 (TurboMAG) | Verified |
| Vaillant MAG 14-2/0 H R1 | MAG ES/PT 14-2/0 (TurboMAG) | Verified |
| Vaillant MAG 14-2-0-5 | MAG ES/PT 14-2/0 (TurboMAG) | Verified |
| Vaillant MAG 14-2-0-5 R1 | MAG ES/PT 14-2/0 (TurboMAG) | Verified |
| Vaillant MAG 14-2-0-5 R2 | MAG ES/PT 14-2/0 (TurboMAG) | Verified |
| Vaillant MAG 16-2-0-5 | MAG ES/PT 16-2/0 (TurboMAG) | Verified |
| Vaillant MAG 16-2-0-5 R1 | MAG ES/PT 16-2/0 (TurboMAG) | Verified |
| Vaillant MAG 16-2-0-5 R2 | MAG ES/PT 16-2/0 (TurboMAG) | Verified |
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
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 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 that require diagnosis on the PCB 0020251359
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.
Vaillant fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.20 | Safety temperature limiter disconnection. | Do not bridge contacts or power components directly to test them. Request a technician to check the cause according to the model manual and its revision, without bypassing the protections. The symptom or fault code does not confirm on its own that this part is faulty. |
| F.27 | Safety lockout flame simulation. | Moisture/damage on the PCB electronics can simulate the ionization signal. Check by drying, verifying continuity/voltages of the board and the electrode; if it persists, a technician must confirm whether to replace the PCB. |
| F.37 | Fan speed difference fault. | The PCB powers and reads the fan (power/PWM and tach signal); a driver failure or reading on the board causes the fault code. Check 12 V/PWM and speed signal at the connectors on the board (e.g., X30/X91) and, if the fan/loom are fine, a technician must confirm whether to replace the PCB. |
| F.57 | Measurement program fault. | Internal electronic error; if it persists after a reset, the PCB is defective. Check power supply voltages and continuity; a technician must confirm whether to replace the PCB if it does not start. |
| F.63 | EEPROM fault. | Corrupted/damaged EEPROM memory of the PCB. Check reset and power stability; if the fault persists, a technician must confirm whether to 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, a technician must confirm whether it is necessary to replace the PCB. |
| F.168 | Fault in the water escape sensor. | A technician must check the sensor and the wiring according to the equipment manual. Do not short-circuit the sensor to bypass a protection. The code alone does not confirm a fault in 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 unit does not start after a reset, a technician must confirm whether to 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
- Uniclima internal SKU
- PEVMAG142X
- 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
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- 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)
