
Honeywell Gas Valve Saunier Duval ThemaClassic C 25 E Ref. S1071500
Honeywell gas valve (own code 4000 124 246 1) for Saunier Duval boilers from the Thema, ThemaClassic, ThemaFast, and Isofast ranges. It controls the flow of natural gas to the burner through two coils (22 Vdc/4VA and 24 Vdc/6VA), class B+B. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler is not receiving gas, does not ignite, or shows a gas valve fault.
- Type of part
- Gas valves
- Status
- Refurbished
- Catalogue reference
- S1071500
- Warranty
- 1 year
Saunier Duval boilers compatible with reference S1071500
Gas valve with reference S1071500. 28 verified compatibilities: C24E and C25E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval C24E | Themafast | Contrasted |
| Saunier Duval C25E | Themafast | Contrasted |
| Saunier Duval C28E | Themafast | Contrasted |
| Saunier Duval C30E | Themafast | Contrasted |
| Saunier Duval F24E | Themafast | Contrasted |
| Saunier Duval F25E | Themafast | Contrasted |
| Saunier Duval F25E H-MOD | Themafast | Contrasted |
| Saunier Duval F30E | Themafast | Contrasted |
| Saunier Duval F30E H-MOD | Themafast | Contrasted |
| Saunier Duval C24E | Themaclassic | Contrasted |
| Saunier Duval C25E | Themaclassic | Contrasted |
| Saunier Duval F24E | Themaclassic | Contrasted |
| Saunier Duval F25E | Themaclassic | Contrasted |
| Saunier Duval F AS 24E | Themaclassic | Contrasted |
| Saunier Duval F AS 25E | Themaclassic | Contrasted |
| Saunier Duval F AS 30E | Themaclassic | Contrasted |
| Saunier Duval C24E | Thematek | Contrasted |
| Saunier Duval F24E | Thematek | Contrasted |
| Saunier Duval F30E H-MOD | Isofast | Contrasted |
| Saunier Duval F35E H-MOD | Isofast | Contrasted |
| Saunier Duval C16E | Opalia | Contrasted |
| Saunier Duval F11E | Opalia | Contrasted |
| Saunier Duval F14E | Opalia | Contrasted |
| Saunier Duval F17E | Opalia | Contrasted |
| Saunier Duval C24E | Thema | Contrasted |
| Saunier Duval C25E | Thema | Contrasted |
| Saunier Duval F24E | Thema | Contrasted |
| Saunier Duval F25E | Thema | 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. S1071500 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 S1071500. 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 that require diagnosis in the gas valve S1071500
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 does not ignite or locks out due to flame failure right after starting.
Cause: If either of the two coils of the gas valve does not receive or maintain the necessary current, the gas flow does not open in time.
Check that power is reaching both connectors of the gas valve at the moment of ignition before replacing it.
- 02
Gas is not reaching the burner even though the boiler is trying.
Cause: A mechanical failure in the valve shutter prevents the gas from passing even though the coils are receiving current.
Check that the main gas valve is fully open and that there is no air left in the line after a recent intervention.
- 03
The display shows a gas valve fault code or warning.
Cause: The control unit compares the signal from the coils with the expected value and indicates a fault when it detects a difference.
Note the exact code: if it appears consistently at the same point in the ignition cycle, it is a more reliable indication than if it appears randomly.
- 04
The boiler ignites but stops shortly after, as if it loses the flame.
Cause: One of the two coils may fail intermittently when it heats up, shutting off the gas flow after a few seconds of operation.
Check if the cut always takes the same time to appear: this points more to a component that heats up and fails, like this gas valve.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F1 | Ignition fault. | The gas block S1071500 does not open or is misaligned and does not provide flow during the spark attempt; check with a manometer at the valve ports (inlet/outlet) and measure voltage/continuity in coils during startup. |
| F.28 | Start-up fault: ignition failed. | Fault in the gas valve assembly (block S1071500) or in its stepper motor prevents opening/modulating the gas during startup; check flow pressure and valve operation (measurement at ports and coil supply) during the ignition attempt. |
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 gas valve S1071500.
- Catalogue reference
- S1071500
- Uniclima internal SKU
- VGTC25E
- Brand
- Saunier Duval
- Type of part
- Gas valves
- Units in stock
- 3 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.
- manufacturer
- Honeywell
- manufacturer code (Honeywell)
- 4000 124 246 1
- coil V1 (voltage/power)
- 22 Vdc / 4 VA
- coil V2 (voltage/power)
- 24 Vdc / 6 VA
- gas
- Natural gas (GAZ NATUREL)
- IP protection
- IP 20
- class
- B+B, Group 1
- manufacturing date (label)
- 07/8/09
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval ThemaClassic F25E Manual (PDF) Document © Saunier Duval, provided as a technical reference.












