Three-Way Valve Motor Saia-Burgess - Vaillant ecoTEC Plus VMW 306/5-5 - Ref. 0020020015
Three-way valve motor that diverts the circuit between heating and domestic hot water in Vaillant ecoTEC boilers. Manufactured by Saia-Burgess, it operates at 230V with a 20% duty cycle and a winding of 150 Ω. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not switch between services, gets stuck in one position, or the motor does not rotate.
- Type of part
- 3-way valves
- Status
- Refurbished
- Catalogue reference
- 0020020015
- Warranty
- 1 year
Vaillant boilers compatible with reference 0020020015
Three-way valve with reference 0020020015. Six confirmed compatibilities: VMW 306/5-5 and VMW 286/5-3.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VMW 306/5-5 | ecoTEC plus / pro (VMW wall-mounted combi) | Contrasted |
| Vaillant VMW 286/5-3 | ecoTEC plus / pro (VMW wall-mounted combi) | Contrasted |
| Vaillant VMW 246/5-5 | ecoTEC plus / pro (VMW wall-mounted combi) | Contrasted |
| Vaillant VMW 236/5-3 | ecoTEC plus / pro (VMW wall-mounted combi) | Contrasted |
| Vaillant VMW 226/3-3 | ecoTEC plus / pro (VMW wall-mounted combi) | Contrasted |
| Vaillant VM 306/5-5 | ecoTEC (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. 0020020015 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 0020020015. 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 in the 3-way valve 0020020015
The 3-way valve diverts water between heating and domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler provides hot water from the tap but the radiators do not heat, or vice versa.
Cause: The motor has not moved the valve completely, so the water continues through the wrong circuit.
With the boiler turned off and cold, check if the valve shaft rotates freely or is stuck before replacing the motor.
- 02
A buzzing sound is heard in the valve area when the boiler tries to switch services, but it doesn't manage to switch.
Cause: The motor receives power, but it does not have enough strength to move the valve due to friction.
Check that the gas valve is not blocked by scale before assuming that the motor is faulty.
- 03
A fault warning related to the three-way valve appears on the boiler display.
Cause: The control board does not detect that the gas valve changes position in time and marks it as a fault.
Note the exact code and check in the manual if it corresponds to this component before ordering it.
- 04
There is a small water leak right in the area where the motor fits onto the valve body.
Cause: The gasket that seals the shaft between the gas valve and the motor is no longer watertight and may wet the motor.
Dry the area, start the boiler, and observe if the dripping reappears before changing the motor.
Vaillant fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.318 | The motor of the 3-way valve is not moving. | The motor of the 3-way valve (Ref. 0020020015) may be stuck, broken, or without power, preventing it from changing position. To check it, force the valve to the middle position using program P.008 and measure if it receives power or if there is continuity. Make sure that the motor moves the stem. |
| F.326 | Problem with several hydraulic components. | The motorized 3-way valve is stuck or unresponsive, possibly due to a loose connector or an interruption, causing a fault in the self-test. Check its movement during the self-test (for example, with program P.008) and inspect the connector and the motor harness. Ensure that the actuator moves the shaft smoothly. |
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 0020020015 three-way valve.
- Catalogue reference
- 0020020015
- Uniclima internal SKU
- MV3VES306
- Brand
- Vaillant
- Type of part
- 3-way valves
- Units in stock
- 2 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.
- Voltage
- 230 V
- Duty cycle
- 20% ED
- Winding resistance
- 150 Ω
- Factory code
- Factory 124-1
- Rotor code
- UCL53N04A2G728
- Manufacturer
- Saia-Burgess
- Product code
- 0020020015
- Product identification
- 3-way diverter valve/motor, plastic, for Vaillant ecoTEC Pro/ecoTEC Plus boilers (VUW/VUI, series 824-938)
- The text printed on the piece is 'Saia' (short brand); the full manufacturer is Saia-Burgess.
Frequently asked questions about the 3-way valve 0020020015
What is the function of the 3-way valve motor Saia-Burgess in the Vaillant ecoTEC Plus VMW 306/5-5 boiler?
Who is the manufacturer of the valve motor of the Vaillant ecoTEC Plus VMW 306/5-5?
Is this valve motor Ref. 0020020015 compatible with the Vaillant VMW 286/5-3 boiler?
What voltage does the Saia-Burgess valve motor of the ecoTEC Plus VMW 306/5-5 operate at?
When is it necessary to replace the valve motor of the Vaillant ecoTEC?
How many models are compatible with the valve motor MV3VES306?
