3-Way Valve Motor Laura 20/30/35 A/AF - Ref. 16506000.02 / MPMV5301
It is the motor/actuator that moves the 3-way valve of the Laura 20, 30, and 35 boilers (A and AF), model MPMV5301, reference 16506000.02. It operates at 220V-240V, 50Hz, with thermal class T70. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not switch properly between heating and domestic hot water, or when the valve motor is stuck or makes noise.
- Type of part
- 3-way valves
- Status
- Refurbished
- Catalogue reference
- 122450340
- Warranty
- 1 year
Baxi Roca boilers compatible with reference 122450340
3-way valve with reference 122450340. Three confirmed compatibilities: Laura 20 and Laura 20/20.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca Laura 20 | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 20/20 | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 20/20 F | Baxi Roca Laura | 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. 122450340 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 122450340. 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 in the 3-way valve 122450340
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 does not switch properly between heating and domestic hot water.
Cause: The MPMV5301 motor does not move the diverter all the way in either direction.
Check if the motor completes the travel to the end; some models have a position mark on the upper cap.
- 02
The motor of the 3-way valve makes noise or gets stuck halfway.
Cause: The internal gear of the motor wears out with use and loses strength to move the shaft all the way to the end.
Disassemble the motor and turn the shaft by hand; if it is harder than usual, confirm that the fault is in the motor and not in the valve body.
- 03
The boiler shows an error or blockage related to the 3-way valve.
Cause: The motor's end switch does not send the correct position signal to the PCB, which cuts off operation for safety reasons.
Check the motor connector and make sure the terminals are not loose or corroded before replacing the part.
- 04
The heating or domestic hot water operates intermittently, turning on and off without apparent reason.
Cause: The diverter does not stay fixed in the correct position and oscillates between the two circuits.
Check if the problem occurs consistently in the same mode (heating or domestic hot water) or in both; this helps to determine if the fault is with the motor or the valve body.
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 Baxi Roca 3-way valve 122450340
- Catalogue reference
- 122450340
- Uniclima internal SKU
- MV3VRL30AF
- Brand
- Baxi Roca
- Type of part
- 3-way valves
- Units in stock
- 7 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.
- Supply voltage
- 220V-240V
- Frequency
- 50 Hz
- Thermal class
- T70
- Actuator model
- MPMV5301
- Manufacturer code
- 16506000.02
- Batch code
- 1005
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Baxi Roca Laura 20/20 F Manual (PDF)Document © Baxi Roca, provided as a technical reference.
Frequently asked questions about the 3-way valve 122450340
Is this 3-way valve motor MPMV5301 compatible with the Laura 20 boiler?
What voltage does the motor of the 3-way valve in the Baxi Roca Laura range operate at?
When is it necessary to replace the MPMV5301 motor in a Laura range boiler?
Does the MPMV5301 motor move the entire 3-way valve or just the internal mechanism?
How many models are compatible with the 3-way valve motor MPMV5301?
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