Honeywell Gas Valve for Saunier Duval Thema F and Glow-Worm GW 24CI - Ref. S1071400
When the heating starts, the Honeywell gas valve for Saunier Duval Thema F and Glow-Worm GW 24CI is responsible for regulating and allowing the flow of gas to the burner. If this part fails, you will notice that the boiler does not ignite, there may be flame lockouts, or a malfunction in gas modulation. This valve is compatible with several models, such as Themafast C 24 E, Themaclassic F 24 E, and Themaplus F 25 E, among others. It is recommended to replace it if you experience faults such as F.26, F.27, or F.62.
Saunier Duval boilers compatible with reference S1071400
Gas valve with reference S1071400. 24 verified compatibilities: Themafast C 24 E and Themafast C 25 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Themafast C 24 E | Themafast | Contrasted |
| Saunier Duval Themafast C 25 E | Themafast | Contrasted |
| Saunier Duval Themafast F 24 E | Themafast | Contrasted |
| Saunier Duval Themafast F 25 E | Themafast | Contrasted |
| Saunier Duval Themaclassic C 24 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic C 25 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic F 24 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic F 25 E | Themaclassic | Contrasted |
| Saunier Duval Themaplus C 24 E | Themaplus | Contrasted |
| Saunier Duval Themaplus F 24 E | Themaplus | Contrasted |
| Saunier Duval Themaplus F 25 E | Themaplus | Contrasted |
| Saunier Duval Thema C 24 E | Thema | Contrasted |
| Saunier Duval Thema F 24 E | Thema | Contrasted |
| Saunier Duval Thema F 25 E | Thema | Contrasted |
| Saunier Duval Thematek C 24 E | Thematek | Contrasted |
| Saunier Duval Thematek F 24 E | Thematek | Contrasted |
| Saunier Duval Isofast F 30 E H-MOD | Isofast | Contrasted |
| Saunier Duval Isofast F 35 E H-MOD | Isofast | Contrasted |
| Saunier Duval Isosplit C 28 E | Isosplit | Contrasted |
| Saunier Duval Isosplit F 30 E | Isosplit | Contrasted |
| Saunier Duval Isosplit F 35 E | Isosplit | Contrasted |
| Saunier Duval Opalia C 16 E | Opalia | Contrasted |
| Saunier Duval Opalia F 14 E | Opalia | Contrasted |
| Saunier Duval Opaliaplus F 17 E | Opalia | 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. S1071400 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 S1071400. 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 S1071400 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 does not ignite, or it makes several attempts before lighting.
Cause: The valve does not open the gas flow to the main solenoid, or the electromagnet does not receive the opening command properly.
Measure with a multimeter that there is power reaching the connectors of the gas valve before declaring it faulty.
- 02
The flame modulates with fluctuations: it rises and falls in power for no apparent reason.
Cause: The modulation actuator of the gas valve does not properly regulate the gas flow to the burner.
Clean the flame sensor and check the heat exchanger before attributing the fault to the gas valve: poor combustion produces the same symptoms.
- 03
There is a smell of gas near the boiler, or a loss of tightness is noticeable.
Cause: An internal gasket of the gas valve has lost tightness and allows gas to pass even when it is in the closed position.
Locate the exact point with soapy water in the connections before assuming that the leak is coming from the gas valve.
- 04
An error code related to the flame or gas supply appears on the display.
Cause: The control unit detects that the gas valve does not respond to the opening or closing command and locks for safety.
Note the exact code and check it in the boiler manual to confirm that it points to the gas valve and not to the electrode or the ionization sensor.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.26 | Fault: gas valve not functioning. | The Honeywell gas valve S1071400 does not open because the stepper motor/solenoids do not receive or do not respond to the command. Check the connector/harness, coil continuity, and ensure that the valve is powered during the ignition attempt; also check that there is no pressure at the outlet during the attempt. |
| F.27 | Safety shutdown: flame simulation. | Defective/leaky gas valve S1071400 allows gas to pass when it should be closed, simulating a flame. Check tightness and closure: perform a pressure drop test at the burner inlet and confirm that ionisation ceases when the gas is cut off. |
| F.28 | Start-up fault: ignition failed. | The gas valve S1071400 does not open or is poorly calibrated, preventing the gas supply during ignition. Check that the electronics command opening (voltage to coils) and that pressure appears at the outlet during the attempt; if it does not open or is erratic, replace/adjust. |
| F.61 | Fault: gas valve control. | Electrical defect in valve S1071400 (coil short-circuited/grounded) or in its wiring causes activation fault. Check coil resistance/insulation and continuity of the harness to the PCB; if there is a ground leak or values are out of range, replace the valve. |
| F.62 | Gas valve fault. Disconnection delay. | The S1071400 valve takes time to close or remains unsealed, maintaining gas after the stop command. Check closing time and tightness (pressure/ionisation test after cut-off); if gas or residual flame persists, replace the 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 gas valve S1071400.
- Catalogue reference
- S1071400
- Brand
- Saunier Duval
- Type of part
- Gas valves
- Units in stock
- 0 units
- 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.
- Modulating coil voltage
- 24 VDC
- Modulating coil power
- 6 VA
- Type of gas
- NATURAL GAS
- Protection
- IP 20
- Solenoid voltage V1
- 22 Vdc (4VA)
- Solenoid voltage V2
- 24 Vdc (6VA)
- Maximum pressure
- P.max 60 mbar
- Equivalent model (Honeywell)
- VK8525M1003
Frequently asked questions about the gas valve S1071400
Does this gas valve work for my Glow-Worm GW 24CI boiler?
How many solenoids does the gas valve of the Isofast F 30 EH have?
What fault does replacing this gas valve in a Thema F 24 E resolve?
What gas does the valve of the Opalia C 16 E use?
How many models are compatible with the Honeywell VGTSF24E gas valve?
What fault codes are documented for this gas valve?
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