
Actuator Motor 3-Way Valve Saunier Duval Isofast F35 E1 Ref. S5720600
When you open the hot water tap or turn on the heating, the actuator motor of the Saunier Duval Isofast F35 E1 three-way valve is responsible for directing the water between the heating circuit and the domestic hot water circuit. If this part fails, you may notice that you have hot water but no heating, or vice versa, and there may even be a mixing of both circuits. This actuator motor is compatible with several boiler models, such as the ThemaClassic C 24 E, Themafast F 30 E, Isofast C 28 E, among others. It is recommended to replace the part when you start experiencing these operational issues.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S5720600
3-way valve with reference S5720600. 25 confirmed compatibilities: C 24 E and F 24 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C 24 E | ThemaClassic | Contrasted |
| Saunier Duval F 24 E | ThemaClassic | Contrasted |
| Saunier Duval F 25 E | ThemaClassic | Contrasted |
| Saunier Duval C 25 E | ThemaClassic | Contrasted |
| Saunier Duval F 30 E | ThemaClassic | Contrasted |
| Saunier Duval F AS 25 E | ThemaClassic | Contrasted |
| Saunier Duval F AS 30 E | ThemaClassic | Contrasted |
| Saunier Duval C 24 E | Themafast | Contrasted |
| Saunier Duval F 24 E | Themafast | Contrasted |
| Saunier Duval F 30 E | Themafast | Contrasted |
| Saunier Duval C 28 E | Themafast | Contrasted |
| Saunier Duval C 28 E | Isofast | Contrasted |
| Saunier Duval F 28 E | Isofast | Contrasted |
| Saunier Duval C 35 E | Isofast | Contrasted |
| Saunier Duval F 35 E | Isofast | Contrasted |
| Saunier Duval C 28 E | Isomax | Contrasted |
| Saunier Duval F 28 E | Isomax | Contrasted |
| Saunier Duval C 28 E2 | Isomax | Contrasted |
| Saunier Duval F 28 E2 | Isomax | Contrasted |
| Saunier Duval C 24 EA | Isotwin | Contrasted |
| Saunier Duval C 28 EA | Isotwin | Contrasted |
| Saunier Duval F 24 EA | Isotwin | Contrasted |
| Saunier Duval F 28 EA | Isotwin | Contrasted |
| Saunier Duval C 24 E | Combitek | Contrasted |
| Saunier Duval F 24 E | Combitek | 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. S5720600 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 S5720600. 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 S5720600 three-way valve 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 boiler only provides hot water or heating, without distributing between the two.
Cause: The valve has become stuck in one of the positions and does not change.
Manually request a mode change and observe whether the motor attempts to move or does not react.
- 02
The display shows a valve motor or limit switch error.
Cause: The control board does not receive the signal that the motor has completed its travel on time.
Check if the fault always occurs at the same point in the cycle; if so, point to the gas valve.
- 03
The motor does not turn or gets stuck halfway when switching circuits.
Cause: The internal mechanism of the actuator is jammed or the gear has lost traction.
Check if you feel resistance when turning the shaft by hand with the boiler off; if it is difficult, it may be due to scale or dirt in the gas valve.
- 04
The heating takes longer than usual to warm up after requesting hot water.
Cause: The valve does not fully return to the heating circuit after responding to the domestic hot water request.
Time how long it takes to heat up after closing the tap; if the delay is always large and consistent, check the entire path of the gas valve.
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 S5720600 three-way valve.
- Catalogue reference
- S5720600
- 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.
- voltage
- 220V-240V
- frequency
- 50Hz
- Temperature class
- T70
- Secondary code
- 105901
- Batch code or date
- B16 1500












