Saunier Duval Gas Valve Semia Tek F 24 Ref. 0020075740
The gas valve Saunier Duval Semia Tek F 24, reference 0020075740, regulates and allows the flow of gas to the burner according to the commands of the PCB. When it fails, the boiler may not ignite, experience flame lockouts, or have modulation issues. This valve is compatible with models such as Semia Tek F 24, Isotwin C 25 E, Isomax Condens 30-B, among others. It is recommended to replace it when errors such as F.26, F.61, F.62, or F.88 are detected.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020075740
Gas valve with reference 0020075740. 22 verified compatibilities: Semia Tek F 24 and Semia Tek C 24.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Semia Tek F 24 | Semia / Semia Tek | Contrasted |
| Saunier Duval Semia Tek C 24 | Semia / Semia Tek | Contrasted |
| Saunier Duval Semia C 24 | Semia / Semia Tek | Contrasted |
| Saunier Duval Semia V 24 | Semia / Semia Tek | Contrasted |
| Saunier Duval Semia F 24 | Semia / Semia Tek | Contrasted |
| Saunier Duval Isotwin C 25 E | Isotwin | Contrasted |
| Saunier Duval Isotwin C 25 EV | Isotwin | Contrasted |
| Saunier Duval Isotwin C 30 E | Isotwin | Contrasted |
| Saunier Duval Isotwin F 25 E | Isotwin | Contrasted |
| Saunier Duval Isotwin F 30 E | Isotwin | Contrasted |
| Saunier Duval Isotwin V 25 | Isotwin | Contrasted |
| Saunier Duval Isotwin Condens F 30 B | Isotwin | Contrasted |
| Saunier Duval Isomax Condens 30-B | Isomax Condens | Contrasted |
| Saunier Duval Isomax Condens 35-B | Isomax Condens | Contrasted |
| Saunier Duval Isomax Condens F 35-B | Isomax Condens | Contrasted |
| Saunier Duval Isomax Condens F 35 E | Isomax Condens | Contrasted |
| Saunier Duval Isomax Condens F 30-B | Isomax Condens | Contrasted |
| Saunier Duval Themaplus Condens 30-B | Themaplus Condens | Contrasted |
| Saunier Duval Themaplus Condens 35-B | Themaplus Condens | Contrasted |
| Saunier Duval Themafast Condens 30 B | Themafast Condens | Contrasted |
| Saunier Duval Duomax Condens F30 90/1 | Duomax Condens | Contrasted |
| Saunier Duval Duomax Condens F34 90/1 | Duomax Condens | 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 0020075740 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 0020075740. If it is not visible, do not identify the part by 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 0020075740 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, you can hear the spark, but the flame does not catch.
Cause: The gas valve does not open the passage or opens it with a delay, and the ignition system runs out of gas at the moment of the spark.
Check that the main gas valve is fully open and that no cut-off has occurred due to a previous fault.
- 02
The flame burns but flickers or changes size on its own, without you having touched anything.
Cause: An internal electromagnet of the valve does not maintain a stable flow and the gas mixture varies.
Observe if the blinking coincides with changes in water or heating demand, or if it also occurs at rest, to narrow down the source.
- 03
The boiler no longer modulates: it always gives the maximum flame or it keeps turning on and off instead of gradually adjusting.
Cause: The modulating coil of the gas valve has lost precision and now only responds in an on or off manner.
Check the display for any flame or modulation fault codes before replacing the gas valve.
- 04
There is a slight smell of gas near the boiler even when it is off.
Cause: An internal gasket of the gas valve may have lost its seal and allowed a small amount of gas to pass through.
In case of any gas smell, turn off the shut-off valve and ventilate; this should not be checked at home, notify a technician or the gas company immediately.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.26 | Fault: gas valve not functioning. | The stepper motor/actuator of the gas valve (0020075740) is disconnected or faulty, so it does not open/close. Check continuity and resistance of coils, connectors, and presence of control signal by running the test program P.0 according to the manual. |
| F.61 | Fault: defective control/operation of the gas valve. | Coils or actuator of the gas valve (0020075740) in short circuit or faulty wiring harness prevent the PCB from activating it. Check wiring, coil resistance, and control signal at terminals (depending on model 24 V=/5 V=) before replacing the valve. |
| F.62 | Fault: delay in the disconnection/closure of the gas valve. | The gas valve (0020075740) closes late or is not sealed, and the control detects a flame after the stop command. Check the valve's seal, burner dirt, connectors/wiring harness, and, if necessary, replace the valve. |
| F.88 | Error: gas valve (connection/short circuit). | The gas valve (0020075740) is incorrectly connected or short-circuited, and the electronics do not recognise it. Check connectors, harness continuity, and coil resistance; if the fault 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 gas valve Saunier Duval 0020075740
- Catalogue reference
- 0020075740
- Brand
- Saunier Duval
- Type of part
- Gas valves
- Units in stock
- 6 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the gas valve 0020075740
Is this gas valve suitable for the Saunier Duval Semia Tek F24?
Does this gas valve fit the Isotwin C25 E or the Isotwin C30?
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