PCB Baxi Roca NGM 15/20 SE - Chaffoteaux Et Maury Ref. 005679932
Main PCB of the Baxi Roca NGM 15/20 SE boiler. The manufacturer Chaffoteaux et Maury for Roca / Baxi Roca assigns it the commercial reference 005679932; on the PCB itself, the code 79931-G is printed, while the assembled unit is identified as 79932. Replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not ignite, does not respond to controls, or loses communication with the thermostat.
Baxi Roca boilers compatible with reference 005679932
PCB with reference 005679932. A proven compatibility: NGM 15/20 SE.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Baxi Roca NGM 15/20 SE | NGM | 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. 005679932 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 005679932. 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 005679932
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, makes no noise, and the display is off.
Cause: The PCB distributes the power; if it fails, current does not reach the other components.
Check if there is mains voltage in the boiler and inspect the fuse on the PCB with a multimeter before ruling it out.
- 02
The room thermostat does not control the boiler.
Cause: The communication with the thermostat goes through a circuit on the PCB; if that circuit fails, the boiler does not receive the commands.
Do not bridge contacts or power components directly to test them. Request a technician to check the cause according to the model manual and its revision, without bypassing the protections. The symptom or fault code does not confirm on its own that this part is faulty.
- 03
The boiler loses connection with the thermostat and operates intermittently.
Cause: An intermittent fault in the PCB causes the heating command to be received only sometimes.
Check that the thermostat cable does not have a loose splice or is pinched before replacing the PCB.
- 04
No button on the panel responds, neither to turn on nor to adjust the temperature.
Cause: The microprocessor on the PCB reads and executes the commands from the panel; if it is damaged, it stops functioning.
Note if the fault started after a power outage or a voltage surge, as this is a common indication of a damaged PCB.
Fault codes Baxi Roca that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 20 | Communication error between Control and Control Board. | The PCB can cause this fault code if the communication bus with the control/display fails: loss of 5 V, clock/data, or transceiver fault in the PCB. Check continuity of the wiring and 5 V at the bus connector; if the control and cable are correct, replace the PCB 005679932. |
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 005679932
- Catalogue reference
- 005679932
- Uniclima internal SKU
- PLBA147
- Brand
- Baxi Roca
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- Mains voltage
- 220 V
- Room thermostat power supply (TA)
- 24 V
- Original Equipment Manufacturer (OEM)
- Chaffoteaux et Maury (Montrouge, France)
- Bare PCB code
- 79931-G
- Assembly reference (Chaffoteaux et Maury)
- 79932 (label STE-06-94-79932 H)
- Commercial reference (Baxi Roca)
- 005679932
- The physical manufacturer of this PCB is Chaffoteaux et Maury, although it is marketed under the brand Roca / Baxi Roca with reference 005679932; they are not different parts, it's the same PCB with two identifications.
Frequently asked questions about the PCB 005679932
Why does the PCB of the Roca Baxi NGM 15/20 SE have Chaffoteaux printed on it if my boiler is Roca / Baxi?
Is this PCB suitable for my Baxi Roca NGM 15/20 SE?
What voltage does the room thermostat connected to the PCB of the NGM 15/20 SE require?
Is reference 005679932 and code 79932 printed on the PCB the same part?
When should this PCB be replaced in the NGM 15/20 SE?
