Huba Control Pressure Switch 401.93000 - Baxi Roca Laura 20/20 F
Huba Control pressure sensor, code 401.93000, for Baxi Roca Laura and Novanox boilers. It measures a differential pressure of 0 to +3 mbar and provides an analog output signal between 0.5 and 4.5V proportional to the reading, powered at 12VDC. Replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not correctly detect the pressure and locks out or fails to start.
- Type of part
- Pressure switches
- Status
- Refurbished
- Catalogue reference
- 122460020
- Warranty
- 1 year
Baxi Roca boilers compatible with reference 122460020
Pressure switch with reference 122460020. Nine verified compatibilities: Laura 20 AF and Laura 20 F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca Laura 20 AF | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 20 F | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 20/20 F | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 20/20 T | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 30 AF | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 30/30 F | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 35 AF | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura 35/35 F | Baxi Roca Laura | Contrasted |
| Baxi Roca Laura Plus 28/28F | 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. 122460020 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 122460020. 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 122460020
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 locks out due to pressure without any noticeable draft problem at first glance.
Cause: The pressure sensor sends a signal outside the range expected by the control board, even though the actual flue is correct.
Check that the sensor connector is properly seated and that there are no bent or oxidized pins.
- 02
The pressure fault appears and disappears on its own, without a clear pattern.
Cause: An unstable signal in the sensor causes the control board to receive erratic pressure values.
Check the pressure intake tubes for condensation water or if they are partially crushed.
- 03
The boiler starts well when cold but fails after running for a while.
Cause: The sensor may lose accuracy due to heat or fan vibration and send a reading outside the valid range.
Note if the fault appears only after the system has been running for a while, not just at startup.
- 04
The fan operates normally, but the boiler still locks out due to pressure.
Cause: The sensor does not correctly translate the air flow into the signal that the control board needs to continue.
Check for air leaks at the fan joints and in the combustion chamber before replacing the sensor.
Fault codes Baxi Roca that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 03 | Lack of pressure | The boiler indicates that there is a lack of pressure in the heating circuit. This may be due to a leak in the system or that it has not been filled properly. Check the pressure gauge and ensure 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.
Datasheet for the Baxi Roca 122460020 pressure switch
- Catalogue reference
- 122460020
- Uniclima internal SKU
- PCRL2020F
- Brand
- Baxi Roca
- Type of part
- Pressure switches
- Units in stock
- 0 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
- 401.93000
- Pressure range
- 0...+3 mbar
- Maximum pressure
- 25 mbar
- Power supply
- 12VDC (10.4-18VDC)
- Output
- 0.5-4.5V RL=19kOhm
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 122460020
Is this Huba Control pressure sensor suitable for a Baxi Roca Laura 20/20 F natural gas boiler?
Which manufacturer makes this pressure sensor for the Baxi Roca Laura 20/20 F?
What fault does this Huba Control 401.93000 sensor resolve in the Laura 20/20 F?
How do I check if this sensor is for my Baxi Roca Laura?
What signal does this pressure sensor deliver to the control unit of the Laura 20/20 F?
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