Junkers PCB ZW24AE23 Ref. 45007685-001
If your boiler does not start, locks out, or exhibits erratic behavior, you may need the Junkers PCB ZW24AE23 Ref. 45007685-001, manufactured by Honeywell. This control board is responsible for managing the ignition, burner modulation, pump, and safety features of the boiler. A failure of this component can result in fault code F0, which indicates an internal problem with the board. It is compatible with models from the Junkers Ceraclass Midi range, such as the ZW24 AE23 S2805 and the ZW24 KE23 S2895, among others. Its replacement is recommended upon detecting these malfunction symptoms.
Junkers boilers compatible with reference 87083002440
PCB with reference 87083002440. Six confirmed compatibilities: ZW24 AE23 S2805 and ZW24 KE23 S2895.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZW24 AE23 S2805 | Junkers Ceraclass Midi | Contrasted |
| Junkers ZW24 KE23 S2895 | Junkers Ceraclass Midi | Contrasted |
| Junkers ZW24 AE31 S2805 | Junkers Ceraclass Midi | Contrasted |
| Junkers ZW24 KE31 S2895 | Junkers Ceraclass Midi | Contrasted |
| Junkers ZW24-2E DV AE23 S2805 | Junkers Ceraclass Midi | Contrasted |
| Junkers ZW24-2E DV AE31 S2805 | Junkers Ceraclass Midi | 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. 87083002440 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.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 87083002440. If it is not visible, do not identify the part by 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 and faults that the PCB 87083002440 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: there is no display, pilot light, or attempt to start.
Cause: The PCB does not receive or distribute electrical power to the boiler.
Check the fuse on the PCB and measure with a multimeter if there is power at the input before replacing it.
- 02
The fault code on the display changes every time you reset the boiler.
Cause: An intermittent fault in the control electronics causes errors that do not correspond to a fixed physical component.
Note each code that appears; if it does not repeat after several resets, the PCB is the main suspect.
- 03
The fan works, but the circulation pump does not start at any time.
Cause: The relay on the PCB that powers the pump does not close the contact.
Connect the pump directly to another outlet to check that it works properly before replacing the PCB.
- 04
The boiler does not respond to the thermostat commands or the buttons on the panel.
Cause: The PCB has lost communication with the thermostat or the control panel.
Check the communication bus wiring on the terminal block of the PCB and perform a complete reset before replacing it.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F0 | Internal fault in the PCB. | The electronic module (PCB) has an internal fault (data/circuit) causing the F0 lockout. Check power supply, connectors, and moisture on the board; if it persists, replace and configure the board 87083002440. |
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 PCB Junkers 87083002440
- Catalogue reference
- 87083002440
- Brand
- Junkers
- Type of part
- PCBs (control boards)
- Units in stock
- 0 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
- 45007685-001
- Control voltage
- 24V
Frequently asked questions about the PCB 87083002440
What code is printed on this PCB of the Junkers ZW24KE31?
For which variants of the Junkers ZW24 is this PCB suitable?
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