Water Pressure Sensor Vaillant ecoTEC Plus / Pro / Exclusive - Ref. 0020059717
The water pressure sensor measures the pressure of the circuit and sends the reading to the boiler's PCB. If it malfunctions, it can cause incorrect readings and lockouts due to a false lack of pressure, resulting in fault codes such as F.22, F.73, F.74, and F.75. This component is compatible with several Vaillant boilers, including the ecoTEC Plus, Pro, and Exclusive models, among others. It is recommended to replace it when these symptoms are detected or when the operation of the boiler is affected.
VAT included
Consult via WhatsAppVaillant boilers compatible with reference 0020059717
Pressure sensor with reference 0020059717. 17 verified compatibilities: VMW 236/5-3 and VMW 240/3-3 M.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VMW 236/5-3 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 240/3-3 M | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 242/3-3 M | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 242/3-5 M | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 280/3-5 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 286/5-3 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VMW 306/5-5 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VM 240/3-5 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VM 280/3-5 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VM 306/5-5 | Vaillant ecoTEC Plus (VMW / VM) | Contrasted |
| Vaillant VC 146/4-7 | Vaillant ecoTEC / VC (heating only) | Contrasted |
| Vaillant VC 206/4-7 | Vaillant ecoTEC / VC (heating only) | Contrasted |
| Vaillant VC 276/4-7 | Vaillant ecoTEC / VC (heating only) | Contrasted |
| Vaillant VKK 806/3-E | Vaillant ecoVIT / VKK (floor-standing, condensing) | Contrasted |
| Vaillant VKO 156/3-7 | Vaillant ecoVIT / VKK (floor-standing, condensing) | Contrasted |
| Vaillant VKO 256/3-7 | Vaillant ecoVIT / VKK (floor-standing, condensing) | Contrasted |
| Vaillant VKO 356/3-7 | Vaillant ecoVIT / VKK (floor-standing, condensing) | 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. 0020059717 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 0020059717. 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 pressure switch 0020059717 resolves.
The pressure sensor measures the water pressure for the electronics. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler shows a pressure fault even though the circuit is full and bled.
Cause: The sensor sends an incorrect or null pressure reading, causing the PCB to think that there is a lack of water.
Compare the pressure on the physical manometer of the boiler with the one displayed on the digital screen; if they do not match, the problem may be the sensor.
- 02
The circulation pump does not start despite there being sufficient pressure in the circuit.
Cause: The PCB prevents the pump from starting if it does not receive a valid pressure signal from the sensor.
Check that the sensor connector is properly connected and free of moisture before replacing it.
- 03
The pressure reading on the display fluctuates sharply without any apparent reason.
Cause: Damage to the membrane or the internal circuit of the sensor causes unstable readings that the PCB interprets as a fault.
Record the reading for a few minutes with the boiler off and without touching the filling; if it varies on its own, the sensor is the main suspect.
Fault codes from Vaillant that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.73 | Water pressure sensor signal out of range (too low). | The sensor 0020059717 may be faulty or shorted to ground, delivering a low signal; check 5/24 V and sensor wiring and compare the actual pressure (manometer) with the display reading. |
| F.74 | Water pressure sensor signal out of range (too high). | Internal fault of the sensor 0020059717 or cable short to 5/24 V causes high signal; check the harness to the sensor for shorts and measure the sensor's power supply/signal. |
| F.75 | The pressure change is too low when starting the heating pump. | If the sensor 0020059717 does not detect a pressure increase when the pump starts, the boiler locks out due to lack of water; check that the pressure reading changes at the pump start and compare with the pressure gauge. |
| F.22 | Installation pressure too low. | A faulty sensor 0020059717 may report low pressure even if it is correct; verify the actual pressure with a manometer against that shown by the boiler and check the power supply/wiring of the sensor. |
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.
Vaillant 0020059717 Pressure Sensor Datasheet
- Catalogue reference
- 0020059717
- Brand
- Vaillant
- Type of part
- Pressure sensors
- Units in stock
- 4 units
- 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.
- Part code
- 0020059717
- Batch code/date
- 2066.2101
