3-Way Diverter Valve Saunier Duval Semia/Semiatek F24 Ref. 0020037113
If you notice that you have hot water but the heating is not working, you may need the Saunier Duval Semia/Semiatek F24 three-way diverter valve. This valve is responsible for directing water between the heating circuit and the domestic hot water circuit. When it fails, you may experience mixing of both circuits or only one of them operating. It is compatible with several models from the Semia and SemiaTek range, such as the Semia F 24 and the SemiaTek C 24, among others. It should be replaced when symptoms of malfunction or faults such as F.20, which indicates a safety disconnection due to temperature limiter, occur.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020037113
Three-way valve with reference 0020037113. Seven confirmed compatibilities: Semia C 24 and Semia F 24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Semia C 24 | Semia | Contrasted |
| Saunier Duval Semia F 24 | Semia | Contrasted |
| Saunier Duval Semia F 24 External | Semia | Contrasted |
| Saunier Duval SemiaTek C 24 | SemiaTek | Contrasted |
| Saunier Duval SemiaTek F 24 | SemiaTek | Contrasted |
| Saunier Duval SemiaTek 3 24 E | SemiaTek | Contrasted |
| Saunier Duval SemiaTek 3 24 SE | SemiaTek | 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 the reference 0020037113 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 0020037113. 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 0020037113 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
When opening the tap, it takes a long time for hot water to come out, or it doesn't heat up completely.
Cause: The valve does not fully move to the hot water position and leaves part of the flow in heating.
Close the radiator valves for a moment and open the hot water tap: if it improves, the gas valve is not closing properly on that side.
- 02
Warm water is coming out, neither cold nor hot, no matter how long you wait.
Cause: The valve shutter does not seal properly and allows cold water to mix with the hot water.
Check if the problem occurs consistently or only intermittently: if it is constant in all taps, suspect the valve before the boiler in general.
- 03
You notice humidity or drops on the metal body of the gas valve, underneath the boiler.
Cause: The internal seals wear out over time and may fail at that point.
Locate the exact source of the moisture with dry paper or paint before replacing: it may come from a nearby fitting and not from the valve body.
- 04
The boiler does not distribute well between heating and domestic hot water: it stays in one mode and does not switch to the other.
Cause: The switching mechanism is blocked or the motor loses power to move the rod.
With the boiler cold, try to move the stem of the gas valve by hand if the model allows it, to rule out that it is simply stuck due to limescale.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.20 | Safety shutdown: temperature limiter | If the 3-way valve (priority) gets stuck or disconnected, it does not switch the circuit and the primary does not circulate correctly; the heat exchanger overheats and triggers the limiter. Verify by ordering the movement of the valve (e.g., service/diagnostic tests of the equipment) and confirming that it switches mechanically and receives a signal. |
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 0020037113 three-way valve.
- Catalogue reference
- 0020037113
- 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.
- Component reference
- 0020037113
- Alternative reference
- 8000041517
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval SemiaTek 3 24 SE Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the 3-way valve 0020037113
What is the reference for the 3-way diverter valve of Saunier Duval Semia/Semiatek F24?
For which models is the Saunier Duval 3-way diverter valve compatible?
What symptoms indicate that the 3-way valve of the Semiatek F24 needs to be replaced?
What fault code is associated with the 3-way diverter valve?
How many models are compatible with this diverter valve?
Spare parts related to Saunier Duval SemiaTek
