Heca PCB for Baxi Roca RS-20/20F Boiler - Fault Code 12.144.02A
When you open the tap or turn on the heating, the Heca PCB for Baxi Roca boiler RS-20/20F is responsible for controlling the ignition, burner modulation, pump, and safety functions. If this part fails, you will notice that the boiler does not start, gets locked, or exhibits erratic behavior. It may display fault codes such as 60-90, 50-70-90, or 40-60-70-90. It is compatible with the RS range, including models like the RS 20/20 F, among others. A technician must confirm through diagnosis whether it needs to be replaced in case of ignition failures or improper operation.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 122123200
- Warranty
- 1 year
Baxi Roca boilers compatible with reference 122123200
PCB with reference 122123200. A proven compatibility: RS 20/20 F.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca RS 20/20 F | RS | 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. 122123200 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 122123200. 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 on the PCB 122123200
The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not ignite, there are no lights or response when trying to turn it on.
Cause: The microcontroller on the PCB is responsible for the startup; if it fails, the boiler will not operate.
Check that there is power in the network and that the main fuse is not blown.
- 02
The boiler turns on but shuts off after a few seconds, always at the same moment.
Cause: The microcontroller controls the ignition; if it fails, it can cause it to turn off at the same point in the cycle.
Count the time it takes to turn off; if it is always the same, it is likely that the problem is with the PCB.
- 03
The flame varies in power unnecessarily, rising and falling without the boiler requesting it.
Cause: The PCB sends the modulation signal to the gas valve, so a fault here can cause issues with the flame.
Make sure that the gas valve and its coil are functioning properly before considering that the PCB is the cause.
- 04
The panel lights are flashing or the boiler turns off and on by itself intermittently.
Cause: The 230VAC transformer with 10.6V outputs may be supplying an unstable voltage to the PCB.
Measure the 10.6V outputs of the transformer with a multimeter; if they are irregular, check the fault before replacing the PCB.
Fault codes Baxi Roca that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 60-90 | The flame relay is not working properly or is stuck. | The flame relay is integrated into the PCB: if it gets stuck or does not switch, the PCB does not validate the ionisation and locks out. Check the order/status of the relay on the PCB and the ionisation microamps; if there is correct ionisation and the relay does not change, the PCB is faulty. |
| 50-70-90 | Fault in the safety relay, does not close after demand. | The safety relay on the PCB does not close its contacts when the electronics command it. Check the signal to the coil and contact continuity; if it receives the command and does not close (or is carbonised), replace the PCB/control board. |
| 40-60-70-90 | Safety relay, very long ignition timing. | The management of ignition times on the PCB fails because the safety relay (on the PCB) does not act in time. Check gas and spark; if everything is correct and the relay on the PCB delays in acting or does not switch, the cause is the PCB itself. |
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 the Baxi Roca PCB 122123200
- Catalogue reference
- 122123200
- Uniclima internal SKU
- PLCR20-20F
- Brand
- Baxi Roca
- Type of part
- PCBs (control boards)
- Units in stock
- 4 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 manufacturer
- Heca
- PCB code
- 12.144.02A
- transformer
- Primary 230VAC (115VAC), outputs 2x10.6V (approximately 10-13VA), total power rated 30VA, EN 60742, CE marked
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Baxi Roca RS 20/20 F manual (PDF) Document © Baxi Roca, provided as a technical reference.
Frequently asked questions about the PCB 122123200
Is the Heca PCB of the Baxi Roca RS 20/20 manufactured by Heca or Baxi Roca?
Is the Heca PCB code 12.144.02A the same as the SKU MECRRS2020F?
Does the Heca 12.144.02A PCB also work for the Baxi Roca RS-20/20F boiler?
What code should I look for in my Baxi Roca RS 20/20 to confirm that it is this Heca PCB?
