Saunier Duval Thelia 23E Air Pressure Switch Ref. 605.99065
Air pressure switch for Saunier Duval boilers from the Combitek, Eolo, Isotwin, Thelia, and Thema series. It controls the pressure generated by the fan before allowing the burner to ignite. The label shows the code 605.99065, with a switching setting of 48/35 Pa and electrical classification 1(0.5)/250~. Replacement requires first confirming the fault of the part through technical diagnosis, even when it does not switch and the boiler locks when starting the fan.
Saunier Duval boilers compatible with reference 05169200
Pressure switch with reference 05169200. Six confirmed compatibilities: Thema F23E and Combitek F23.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Thema F23E | Thema | Contrasted |
| Saunier Duval Combitek F23 | Combitek | Contrasted |
| Saunier Duval Combitek F23E | Combitek | Contrasted |
| Saunier Duval Isotwin F24EA | Isotwin | Contrasted |
| Saunier Duval Thelia 623 | Thelia | Contrasted |
| Saunier Duval Thelia 623E | Thelia | 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. 05169200 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 05169200. 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 pressure switch 05169200
The pressure switch controls the air or water pressure to authorize operation. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The extractor works well, but the burner does not ignite.
Cause: The pressure switch does not close the air contact, so the control board does not allow the gas valve to open.
Before changing it, make sure that the extractor is at its maximum speed and is not making any strange noises.
- 02
The boiler locks out when starting the fan, almost instantly.
Cause: The pressure switch detects insufficient pressure from the start of the cycle.
Check that the two silicone tubes are properly connected and not reversed.
- 03
The extractor starts and stops several times, as if it hesitates, and in the end, it does not ignite.
Cause: The control board tries several times to receive the pressure signal that is not provided by the pressure switch.
Check that the flue pipe does not have a wrongly placed elbow or is obstructed.
- 04
The fault occurs more often with strong winds or bad weather, and on other days the boiler works fine.
Cause: A pressure switch that is at the limit of its setting may fail when the wind affects the draft of the fan.
Check if the fault coincides with windy days before replacing the part: it could be a flue installation issue and not the pressure switch.
Fault codes Saunier Duval that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 02 | Air/flue fault: the flue circuit does not reach or confirm the required depression (air/SRC/fan/pressure switch). | The air pressure switch does not switch (contact does not close/open) due to a fatigued diaphragm, obstructed silicone tubes, or lack of fan depression; check continuity at terminals with a multimeter during startup and use a manometer applied to the venturi to confirm that the pressure switch changes state. |
| F33 | Airflow fault: air pressure switch open/stuck (flue safety active). | The air pressure switch contact remains open or stuck out of sequence due to a damaged diaphragm or insufficient pressure; check that the fan generates a vacuum, the condition of the tubes, and that the pressure switch operates by applying controlled vacuum and measuring continuity. |
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.
Saunier Duval 05169200 Pressure Switch Datasheet
- Catalogue reference
- 05169200
- Uniclima internal SKU
- PCT23E
- Brand
- Saunier Duval
- Type of part
- Pressure switches
- Units in stock
- 8 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.
- Component code
- 605.99065
- Switching pressure (setpoint)
- 48/35 Pa
- Electrical classification
- 1(0,5)/250~
- Brand printed on the label
- SAUNIER DUVAL
- Internal code (SD)
- SD092399
Frequently asked questions about the pressure switch 05169200
Which models are compatible with the Saunier Duval Thelia 23E air pressure switch Ref. 605.99065?
What does the setting 48/35 Pa of this pressure switch mean?
What electrical capacity does the pressure switch support when installed in a compatible boiler?
How many confirmed models are compatible with the pressure switch PCT23E?
What fault codes are documented for this pressure switch?
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