Saunier Duval Valve Ref. 72242
The Saunier Duval valve Ref. 72242 is a crucial component in your boiler's heating system. Its technical function is to regulate the flow of water, ensuring that the different parts of the boiler receive the necessary amount for proper operation. When this valve fails, the user may notice issues such as the boiler not heating correctly or faults like F.318, F.326, and F.081. This model is compatible with boilers from the RENOVA, SEMIA, THEMA, THEMACLASSIC, and THEMIS ranges, such as the MICRA and the F24. It is recommended to replace it if the mentioned symptoms occur or if faults in the system are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05740400
Válvula de 3 vías con referencia 05740400. Seis compatibilidades contrastadas: MICRA y TEK C24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval MICRA | RENOVA | Contrasted |
| Saunier Duval TEK C24 | SEMIA | Contrasted |
| Saunier Duval TEK F24 | SEMIA | Contrasted |
| Saunier Duval F24NOX | THEMA | Contrasted |
| Saunier Duval F24 | THEMACLASSIC | Contrasted |
| Saunier Duval 23 | THEMIS | 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. 05740400 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 05740400. 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 3-way valve 05740400 resolves.
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 hot water takes time to arrive or comes out lukewarm while the heating works fine.
Cause: The valve does not switch correctly between the circuits and distributes the water poorly.
Check if the actuator or head of the gas valve reaches the limit in both positions before considering it faulty.
- 02
Water leak from the body of the gas valve, not coming from a pipe or threaded connection.
Cause: The internal seals wear out with use and allow water to pass between the channels or to the outside.
Locate whether the moisture comes from the shaft or from a specific joint before deciding to replace the entire part.
- 03
A noise or a slight jerk can be heard when the boiler switches from heating to domestic hot water.
Cause: The internal mechanism gets stuck due to scale or dirt, making it difficult to move to the new position.
Check the water hardness in the area and if there is visible limescale on other parts of the hydraulic circuit.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.318 | The 3-way motorised valve is not moving. | The 3-way valve (actuator or gears) is blocked or without power, so it does not switch between DHW/heating; check by activating the service test and checking voltage/continuity at the motor connector. |
| F.326 | The hydraulic test of the sensor and the actuator has determined that at least two hydraulic components are not functioning. | If the 3-way valve is blocked or disconnected, the hydraulic test detects multiple faults; check the valve movement from the test menu and inspect the connector/wiring harness or replace the assembly if it does not operate. |
| F.081 | The boost has failed. | The brand documents the 3-way valve as a possible cause when it is defective or blocked; confirm by actuating it in service test and, if it does not switch or consumes without turning, replace the valve/motor and check the wiring. |
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 Saunier Duval 05740400 three-way valve.
- Catalogue reference
- 05740400
- Brand
- Saunier Duval
- Type of part
- 3-way valves
- Units in stock
- 1 unit
- 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.
- Code engraved on the part
- 72242
label
Frequently asked questions about the 3-way valve 05740400
Is this valve Ref. 72242 compatible with the Saunier Duval Semia Tek F24?
How do I check that this is the valve for my ThemaClassic F24?
Does this valve Ref. 72242 fit the Saunier Duval Themis 23?
Spare parts related to Saunier Duval SEMIA
