Gas Valve Motor for ThemaClassic F24E - Ref. 115 575 5
When you open the hot water tap, the gas valve motor for ThemaClassic F24E - Ref. 115 575 5 activates to regulate the gas flow to the burner, following the commands from the boiler's PCB. If this part fails, you will notice that the boiler does not ignite, or that it experiences flame lockouts, which could result in fault codes F1 or F4. This motor is compatible with several models, including ThemaClassic F24E, F30E, and F35E, as well as the Combitek and Isofast ranges. It is recommended to replace it when you experience ignition problems or gas modulation failures.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 20146481, S1071700, 1155755
Gas valve with reference 20146481, S1071700, 1155755. Six verified compatibilities: Combitek and Isofast.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Combitek | Combitek | Contrasted |
| Saunier Duval Isofast | Isofast | Contrasted |
| Saunier Duval Isomax | Isomax | Contrasted |
| Saunier Duval F24E | ThemaClassic | Contrasted |
| Saunier Duval F30E | ThemaClassic | Contrasted |
| Saunier Duval F35E | ThemaClassic | 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. 20146481, S1071700, 1155755 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 20146481, S1071700, 1155755. 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 gas valve 20146481, S1071700, 1155755 resolves.
The gas valve regulates and modulates the gas flow to the burner. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler tries to ignite, makes the sparking noise but does not light and gets locked.
Cause: The actuator does not open the gas flow in time, so fuel does not reach the burner when the spark ignites.
Check if the main gas valve is fully open and if there is pressure in the system before inspecting the actuator.
- 02
The boiler is completely unresponsive when requesting heat: there is no sound of an ignition attempt.
Cause: If the actuator does not receive power or the connector is loose, the control unit does not give the opening command and interrupts the cycle.
With the boiler off, check that the connector of the gas valve motor is properly fitted and free of visible corrosion.
- 03
The burner ignites but turns off after a few seconds, repeatedly.
Cause: The actuator opens but does not maintain a stable gas flow, and the flame detector cuts off the supply for safety reasons.
Note if the cut always occurs at the same time after ignition; a fixed pattern indicates a problem with the actuator.
- 04
The boiler works, but intermittently, as if it sometimes has difficulty starting and other times it does not.
Cause: The valve stem moves with more resistance than normal due to wear of the O-rings, and the actuator does not always reach the end of its travel.
Compare if the fault is more frequent in cold conditions, during the first start of the day; that pattern is typical of a failing actuator.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F1 | Ignition fault: the burner fails to establish a flame. | If the stepper motor of the gas valve (S1071700) gets stuck or does not position at minimum opening, the valve does not open/opens insufficiently and there is no gas in the burner. Check by measuring 24 Vdc at the valve connector and verifying the pressure at the test point with a manometer; test the valve/motor according to the manual. |
| F4 | Ignition fault/flame not detected or extinguishes after starting. | A stepper motor of the gas valve that does not open or modulate correctly causes insufficient flow/pressure and the flame does not establish or extinguishes. Verify by opening the valve and measuring pressure at the valve port with a manometer; if there is 24 Vdc control but no gas, check for adjustment/blockage and replace the motor S1071700. |
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 gas valve Saunier Duval 20146481, S1071700, 1155755
- Catalogue reference
- 20146481, S1071700, 1155755
- Brand
- Saunier Duval
- Type of part
- Gas 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.
- Printed reference
- 115 575 5
- Secondary code
- 151/03
- Voltage
- 24 VDC
- Power
- 6 VA
- Degree of protection
- IP 20
- Type of gas
- NATURAL GAS
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval ThemaClassic F35E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the gas valve 20146481, S1071700, 1155755
Does this gas valve Ref. 115 575 5 work for the ThemaClassic F30E?
What voltage and current does the gas valve motor of the ThemaClassic F24E have?
When should the gas valve motor of the Isofast or Isomax be replaced?
What is the degree of protection for the gas valve motor Ref. 115 575 5?
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