Pressure Sensor Baxi R 20/20 / Victoria Ref. 122085040
Baxi R 20/20 and Victoria incorporate the pressure sensor Ref. 122085040. This part measures the water pressure in the circuit and sends the information to the control board. If it fails, you may notice incorrect readings and operational lockouts, such as fault code 03: Low pressure. It is compatible with models from the Baxi Roca RS 20/20 and Baxi Roca R 20/20 ranges, among others. It is recommended to replace it when experiencing pressure issues or lockouts in the system.
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Consult via WhatsAppBaxi Roca boilers compatible with reference 122085040
Pressure sensor with reference 122085040. Four confirmed compatibilities: RS 20/20 and RS 20/20 F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca RS 20/20 | Baxi Roca RS 20/20 | Contrasted |
| Baxi Roca RS 20/20 F | Baxi Roca RS 20/20 | Contrasted |
| Baxi Roca R 20/20 F | Baxi Roca R 20/20 | Contrasted |
| Baxi Roca R 20/20 FF | Baxi Roca R 20/20 | 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. 122085040 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 122085040. 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 122085040 resolves.
The pressure sensor measures the water pressure for the electronics. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler locks out due to low pressure even though the pressure gauge shows the correct pressure.
Cause: The sensor sends the PCB a reading different from the actual one, and the electronics act based on that incorrect data.
Compare the reading of the analog pressure gauge with the pressure value shown on the display before changing the sensor.
- 02
The pressure fault code appears and disappears on its own, without a clear pattern.
Cause: The sensor gives an unstable signal due to an internal fault or a loose contact in its connector.
Check that the sensor connector is properly fitted and free of corrosion before replacing it.
- 03
The boiler never starts even though the circuit is well filled and bled.
Cause: The sensor reports to the PCB a pressure below the minimum, even though the circuit is correct.
Bleed the air from the system properly and check the actual pressure with the manometer before considering the sensor as faulty.
- 04
The pump or the burner suddenly stops in the middle of a heating cycle.
Cause: An erratic reading from the sensor causes the PCB to interpret a sudden pressure drop and shuts down for safety.
Check if the fault always coincides with vibrations or knocks in the pipe, indicating false positives from the sensor.
Fault codes for Baxi Roca that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 03 | Lack of pressure | The boiler indicates that there is a lack of pressure in the heating circuit. If the pressure switch is faulty, it will not be able to send the correct signal and the boiler will not activate. Check the manometer and make sure that the pressure is within the recommended levels. |
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.
Pressure sensor datasheet Roca 122085040
- Catalogue reference
- 122085040
- Brand
- Baxi Roca
- Type of part
- Pressure sensors
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Baxi Roca R 20/20 F manual (PDF)Document © Baxi Roca, provided as a technical reference.
Frequently asked questions about the pressure sensor 122085040
Is this sensor suitable for the Baxi RS 20/20F boiler?
Is this pressure sensor suitable for the Baxi R 30/30?
Is it the same sensor used in the Baxi R 20/20 and the R 20/20F?
Spare parts related to Baxi Roca RS 20/20
