Air Pressure Switch Ciao 24 CSI and Compatible Models Ref. 605.99304
If your boiler does not start or gets blocked despite the pressure seeming correct, the problem may lie in the air pressure switch Ciao 24 CSI, reference 605.99304. This component checks the air pressure and allows the boiler to operate correctly. When it fails, you may see the fault code A03 or a flashing 88°C, indicating an issue with the pressure switch. This pressure switch is compatible with models such as Ciao S 24 CSI and Ciao 25 CSI, among others. It is recommended to replace it when the mentioned symptoms occur.
VAT included
Consult via WhatsAppBeretta boilers compatible with reference R20063584
Pressure switch with reference R20063584. Three confirmed compatibilities: Ciao 24 CSI and Ciao S 24 CSI.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Beretta Ciao 24 CSI | Beretta Ciao CSI | Contrasted |
| Beretta Ciao S 24 CSI | Beretta Ciao CSI | Contrasted |
| Beretta Ciao 25 CSI | Beretta Ciao CSI | 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. R20063584 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 R20063584. 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 R20063584 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 ignites, tries to operate, and shuts down after a few seconds without producing a flame.
Cause: The pressure switch does not close the contact because it does not detect sufficient negative pressure, and the control unit cuts off the gas for safety.
Check that the silicone tubes of the pressure switch are not blocked, sagging, or cracked before replacing it.
- 02
A fault warning for extraction or pressure switch appears on the screen as soon as I try to turn it on.
Cause: It is the message given by the control board when the pressure switch does not send the expected signal within the start-up time.
Check that the fan spins freely and at a good speed, and that the flue is not blocked by snow, leaves, or dirt.
- 03
The fan starts and is heard running, but the boiler does not continue the ignition cycle.
Cause: The extractor spins but does not generate enough pressure for the pressure switch to close, due to an air leak or a poorly connected tube.
Check the joints and connections of the pressure intake pipes, and ensure there are no air leaks in the flue duct.
- 04
The boiler works well for a few minutes and then locks itself, especially on windy days.
Cause: The gusts in the flue gas outlet alter the pressure that the pressure switch reads and cause it to open the contact during operation.
Note if the blockage coincides with days of strong winds and check the condition of the output terminal before replacing the pressure switch.
Fault codes for Beretta that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| A03 | Air pressure switch alarm | The air pressure switch does not switch correctly (it should be open at rest and close when the fan is running), so the PCB detects a lack of draft. Verify it by measuring the continuity of the contact while the fan starts and check the tubes to the venturi for obstructions or cracks. |
| 88°C flashing | Air pressure switch intervention (C.S.I.) | Indicates that the air pressure switch intervened during the cycle (loss/absence of depression) or that the pressure switch itself is giving an incorrect signal. Check the continuity of the pressure switch during the fan's rotation and the condition/placement of the capillaries towards the venturi. |
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.
Datasheet for the Beretta R20063584 pressure switch
- Catalogue reference
- R20063584
- Brand
- Beretta
- Type of part
- Pressure switches
- Units in stock
- 1 unit
- 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.
- Product code
- 605.99304
- Internal code (Cod.)
- 62918195
- Set (switching/reset)
- 100/72 Pa
- Switching value of the contact
- 1(0.5)250~
- Maximum pressure marked on the body
- 1900 Pa
- Batch/date
- 26/03
- There is a very similar variant with the same base code 605.99304 but Cod. 62818195 and a different contact rating (0.1(0.5)250~ compared to 1(0.5)250~ for this part); do not confuse the two.
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 R20063584
What is the set pressure of the air pressure switch for the Ciao 24 CSI?
Is this pressure switch the same as the one marked 605.99304 with Cod. 62818195?
For which models is the PBCIAO24 air pressure switch compatible?
What fault codes are documented for this pressure switch?
Does this pressure switch work for other boiler models?
Spare parts related to Beretta Beretta Ciao CSI
