Beretta Ciao 24 CSI Water Pressure Switch Ref. 20046189
The water pressure switch Beretta Ciao 24 CSI controls the water pressure in the boiler, allowing it to operate properly. If it fails, you will notice that the boiler does not start or gets locked, even though the pressure is correct, and the fault code A04: H2O pressure switch alarm may appear. This component is compatible with models such as Ciao 24 CAI and Ciao 24 CSI, among other boilers in the Beretta Ciao range. It should be replaced when these symptoms of malfunction are detected.
VAT included
Consult via WhatsAppBeretta boilers compatible with reference 20046189
Pressure switch with reference 20046189. Two confirmed compatibilities: Ciao 24 CAI and Ciao 24 CSI.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Beretta Ciao 24 CAI | Beretta Ciao | Contrasted |
| Beretta Ciao 24 CSI | Beretta Ciao | 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 ref. 20046189 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 20046189. 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 pressure switch 20046189 resolves.
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 boiler does not ignite: it tries to start but shuts down after a few seconds.
Cause: The air pressure switch does not close the contact, and the boiler understands that there is not enough draft, so it cuts off the gas for safety.
First, check that the flue gas extractor starts and reaches speed normally before inspecting the pressure switch.
- 02
The boiler locks out after a reset or after being idle for a long time.
Cause: With the boiler cold, the air inside the pressure intake pipe can become trapped, and a pressure switch that is already at its limit may not switch properly.
Force several resets in a row and observe if the fault is always the same or if it changes; if it is erratic, it is advisable to check the connection pipes first.
- 03
It smells strange near the flue just when the boiler shuts down by itself.
Cause: This pressure switch is the last barrier before the gas opens without proper venting, which is why it cuts off the supply at any doubt of draft.
Check the external flue terminal for any nests, leaves, or other obstructions before replacing the component.
Fault codes for Beretta that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| A04 | Water pressure switch alarm. | The water pressure switch does not close/open due to insufficient pressure or a fault, so the PCB does not receive its signal and triggers A04. Check pressure on the manometer (≈1–1.5 bar) and verify continuity/functionality of the pressure switch with a multimeter under pressure. |
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 pressure switch Beretta 20046189
- Catalogue reference
- 20046189
- Brand
- Beretta
- Type of part
- Pressure switches
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- 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.
- set pressure
- 100/70 Pa
- maximum pressure
- 1000 Pa
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Beretta Ciao 24 CSI Manual (PDF)Document © Beretta, provided as a technical reference.
Frequently asked questions about the pressure switch 20046189
Is this part with reference 20046189 compatible with the Ciao 24 CAI boiler?
Is the Beretta Ciao 24 CSI water pressure switch compatible with the Ciao 24 CSI boiler?
How many models are compatible with the Beretta Ciao 24 CSI water pressure switch Ref. 20046189?
What fault code is documented for this part?
Where can I find the reference for this pressure switch?
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