Honeywell PCB Control Baxi Roca Neobit Plus 24/24F Ref. 125128870

Baxi Roca boilers compatible with reference 125128870

PCB with reference 125128870. Five confirmed compatibilities: Neobit Plus and Neobit Plus 24/24 F.

Proven compatibility

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. 125128870 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 125128870. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the PCB 125128870 resolves.

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, and neither the pump nor the gas valve respond when requesting heating.

  Cause: The Omron output relay on the PCB does not switch and does not send current to the pump or gas valve.

  Listen for the relay clicking when the demand is activated; if it doesn't sound, the fault points to the PCB.

• 02

  The same fault code always appears on the screen and the reset does not solve it.

  Cause: Fault of the microcontroller that manages the ignition and safety logic of the boiler.

  Check in the manual that this code does not indicate another component (sensor, pressure switch) before replacing the PCB.

• 03

  The boiler works well for a while and then locks out without any clear pattern.

  Cause: A poor connection or thermal fault on the PCB manifests irregularly depending on the temperature.

  Check and clean the connectors on the PCB, ensuring they fit properly, before replacing it.

• 04

  The thermostat does not send any commands even though the boiler ignites manually.

  Cause: Fault in the communication stage between the PCB and the thermostat.

  Check the wiring and configuration of the thermostat before declaring the PCB faulty.

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 125128870 PCB.

Catalogue reference

125128870

Brand

Baxi Roca

Type of part

PCBs (control boards)

Units in stock

1 unit

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days

Data read on the part and in the manufacturer's documentation

What we have not been able to verify does not appear here.

Component manufacturer

Honeywell

Component code

CS0261F

Full label marking

CS0261F | QM 28/18 | Honeywell | 500568D9-001

Relays

Omron brand

Microcontroller

Atmel logo chip