Water Pressure Switch XP600 For Baxi Roca Laura 30 AF - Ref. 122450050
The XP600 water pressure switch checks the pressure in the heating circuit and authorizes the operation of the boiler. When it fails, the boiler may not start or may lock out, even if the pressure is correct, which can generate fault code 03: Lack of pressure in the heating circuit. This component is compatible with several boilers from the Baxi Roca Laura range, such as the Laura 20/20 F and the Laura 35 AF, among others. A technician should confirm through diagnosis whether it is necessary to replace the pressure switch when you notice starting issues or lockouts in operation.
- Type of part
- Pressure switches
- Status
- Refurbished
- Catalogue reference
- 122450050
- Warranty
- 1 year
Baxi Roca boilers compatible with reference 122450050
Pressure switch with reference 122450050. Four confirmed compatibilities: Laura 20/20 F and Laura 35/35 F S/A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca Laura 20/20 F | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 35/35 F S/A | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 35 AF | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura Plus 28/28 | Baxi Roca Laura | 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. 122450050 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 122450050. 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 122450050
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 start even though the heating circuit has the correct pressure on the gauge.
Cause: The heating water pressure switch may not close the contact even if the pressure is adequate.
Measure the pressure on the boiler's manometer and, if you have an external one, compare it at the same connection point.
- 02
The boiler sometimes locks out due to pressure, with no clear relation to having filled or bled the circuit.
Cause: A pressure switch with incorrect readings can cause lockouts that do not match the actual heating pressure.
Note when the blockages occur and compare them with the pressure indicated by the manometer at that moment.
- 03
The behavior of the boiler does not change when the pressure of the heating circuit is manually increased or decreased.
Cause: If the contact does not change when the pressure varies, the part is not functioning correctly even if the circuit is fine.
With the boiler off, slightly increase the pressure by filling the circuit and observe if the behavior changes when restarting.
- 04
The installation has no visible leaks, but the boiler continues to show a heating pressure fault.
Cause: If there are no leaks, a pressure switch that does not switch correctly is the most common cause of this persistent fault.
Also check the heating expansion vessel, as a broken diaphragm can simulate a similar pressure fault.
Fault codes Baxi Roca that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 03 | Lack of pressure in the heating circuit. | If the water pressure switch (122450050) does not close even though the system is >1 bar (membrane/switch faulty or defective connections), the electronics interpret insufficient pressure and lock with 03. Verify by increasing the pressure to 1.2–1.5 bar and measuring the continuity of the pressure switch: it should close under pressure; if not, replace it. |
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 pressure switch Baxi Roca 122450050
- Catalogue reference
- 122450050
- Uniclima internal SKU
- PDARL30AF
- Brand
- Baxi Roca
- Type of part
- Pressure switches
- Units in stock
- 5 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.
- Manufacturer code
- XP600
- Electrical classification of contacts
- 10(2)A / 250V~
- Adjustable pressure range
- 0.2 ÷ 1.2 bar
- Thermal brand
- T125
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Baxi Roca Laura 20/20 F Manual (PDF) Document © Baxi Roca, provided as a technical reference.
Frequently asked questions about the pressure switch 122450050
What pressure range does the XP600 pressure switch operate in?
Is the XP600 pressure switch suitable for a Baxi Roca Laura 20 AF?
What does the T125 marking on the XP600 pressure switch label mean?
When should the XP600 pressure switch of the Laura 30 AF be replaced?
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