Bertelli & Partners PCB DBM25 - Cointra Excellent Low NOx 24E Ref. 39834970
RefurbishedCointraPCBs (control boards)Bertelli & Partners

Bertelli & Partners PCB DBM25 - Cointra Excellent Low NOx 24E Ref. 39834970

Stock · 2 units

The Bertelli & Partners DBM25 PCB - Cointra Excellent Low NOx 24E Ref. 39834970 is a control device that manages the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, lock out, or operate erratically, potentially displaying the fault code A02, which indicates that there is a flame signal present with the burner off. This PCB is compatible with several boilers in the Excellent range, such as the Excellent Low NOx 24E and 32E, among others. It is recommended to replace it if the mentioned symptoms occur or if faults in its operation are detected.

VAT included

Compatibility

Cointra boilers compatible with reference 39834970

PCB with reference 39834970. Four confirmed compatibilities: Excellent Micro Low NOx 24E and Excellent Micro Low NOx 32E.

Proven compatibility

Boiler modelFamilyVerification
Cointra Excellent Micro Low NOx 24EExcellent Micro Low NOxContrasted
Cointra Excellent Micro Low NOx 32EExcellent Micro Low NOxContrasted
Cointra Excellent Low NOx 24EExcellent Low NOxContrasted
Cointra Excellent Low NOx 32EExcellent Low NOxContrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

How to check if ref. 39834970 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 39834970. 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.
Diagnosis and fault codes

Symptoms and faults that the PCB 39834970 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 start and no LED is lit on the control panel.

    Cause: There is no power reaching the PCB or the internal fuse is blown, and without power, nothing works.

    Use a multimeter to check if 230V are reaching the PCB input and inspect the fuse before replacing it.

  • 02

    A fault code appears on the screen that cannot be reset, or that returns after a few minutes.

    Cause: The PCB detects a real or reading fault and locks the boiler for safety.

    Note the exact code and check if it corresponds to a sensor or ignition fault before blaming the PCB.

  • 03

    The pump or the fan do not start, although a click can be heard on the PCB.

    Cause: The output relay that controls that component has worn out and does not close the contact.

    Check if the pump or the fan spin freely when turned by hand; if they spin well, the fault points to the relay on the PCB.

  • 04

    The domestic hot water does not modulate well: it goes from cold to very hot without a middle ground.

    Cause: The PCB does not correctly manage the modulation signal of the gas valve.

    Check that the water flow is not reduced by limescale in the heat exchanger before attributing it to the PCB.

Fault codes for Cointra that this part resolves.

CodeFaultDiagnosis and solution
A02Flame signal present with the burner off (the boiler detects a flame when there shouldn't be one).One of the two documented causes is the PCB anomaly: the electronics misinterpret or incorrectly generate the ionisation signal. First, check the wiring of the ionisation electrode (rule out the electrode), and if it is correct, check/replace the PCB. Technical sources literally indicate 'PCB anomaly, check the PCB'.

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.

Technical data

Data sheet for the PCB Cointra 39834970

Catalogue reference
39834970
Brand
Cointra
Type of part
PCBs (control boards)
Units in stock
2 units
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.

PCB code
DBM25
Component manufacturer
Bertelli & Partners (B&P)
Frequently Asked Questions

Frequently asked questions about the PCB 39834970

Who manufactures the Bertelli and Partners DBM25 PCB for the Cointra Excellent Low NOx 24E?
The factory Bertelli and Partners (B and P); the code DBM25 is marked on the piece itself.
Is the DBM25 PCB compatible with the Cointra Excellent Micro Low NOx 24E?
Yes, the Excellent Micro Low NOx 24E is among the compatible models, along with the Excellent Micro Low NOx 32E.
Can the code and manufacturer be seen in all the photos of the DBM25 PCB?
No; the code and the manufacturer were identified in other photos of the same part, not on the reverse side.
Does the Bertelli and Partners DBM25 PCB work for the Cointra Excellent Low NOx 32E?
Yes, the Excellent Low NOx 32E is among the compatible models.
How many models are compatible with the Bertelli and Partners DBM25 PCB?
The PCB is compatible with a total of 4 models.
What fault code is documented for this PCB?
The documented fault code for this product is A02.

Spare parts related to Cointra Excellent Micro Low NOx

Delivery 1–2 daysworking days, mainland Spain
1-year warrantyreviewed and tested
14-day returnuninstalled parts
Technical supportwe verify your model
Bertelli & Partners PCB DBM25 - Cointra Excellent Low NOx 24E Ref. 39834970