PCB for Boiler ZW24AE23 and Others Ref. 8708300244
The PCB for the ZW24AE23 boiler, reference 8708300244 from Junkers, is the component that controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, become locked, or operate erratically, displaying the error F0: Internal error in the PCB. This part is compatible with several models from the Ceraclass Midi range, such as the ZW 24 AE 23 and the ZW 24 KE 31, among others. It is recommended to replace it if these fault symptoms occur.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 8708300244
PCB with reference 8708300244. Seven confirmed compatibilities: ZW 24 AE 23 and ZW 24 AE 23 S2805.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZW 24 AE 23 | Ceraclass Midi | Contrasted |
| Junkers ZW 24 AE 23 S2805 | Ceraclass Midi | Contrasted |
| Junkers ZW 24 AE 31 S2805 | Ceraclass Midi | Contrasted |
| Junkers ZW 24 KE 23 S2895 | Ceraclass Midi | Contrasted |
| Junkers ZW 24 KE 31 S2895 | Ceraclass Midi | Contrasted |
| Junkers ZW 24-2E DV AE 23 S2 | Ceraclass Midi | Contrasted |
| Junkers ZW 24-2E DV AE 31 S2 | 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 ref. 8708300244 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 8708300244. 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 and faults that the PCB 8708300244 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 makes ignition noise but the flame does not ignite.
Cause: The PCB controls the ignition; if the spark or gas opening signal is faulty, the burner does not start.
Check the ignition electrode and make sure gas is reaching it before replacing the PCB.
- 02
The boiler is off, with no lights or display, although there is power in the house.
Cause: If the selectable power supply is 230V or 110V, a fault at this stage leaves the equipment without electronics.
Check that the voltage selection on the PCB matches your installation before assuming it is faulty.
- 03
The boiler works for a while and then locks out; it needs to be reset to start again.
Cause: The 24V secondary circuit of the PCB powers sensors and safety devices; a drop in that voltage causes intermittent lockouts.
Note if the lockout occurs consistently with the same demand (heating or domestic hot water) before attributing it to the PCB.
- 04
The remote control or thermostat does not make the boiler respond.
Cause: The demand input on the PCB may be damaged or improperly connected.
Check the continuity of the thermostat wiring and its connection at the terminals before replacing the PCB.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F0 | Internal error in the boiler's PCB (control board). | It is the only code that the technical documentation of the Ceraclass Midi directly attributes to an internal fault of the electronic module (this same part). Verification: check connections and wiring of the PCB; if it persists after ruling out wiring, the PCB is defective and should be replaced. |
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 Junkers 8708300244 PCB.
- Catalogue reference
- 8708300244
- Brand
- Junkers
- 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.
- Selectable power supply voltage
- 230/110V
- Secondary voltage (low voltage circuit)
- 24V
Frequently asked questions about the PCB 8708300244
Is the PCB Ref. 8708300244 compatible with the boiler ZW24AE23?
What boiler models are compatible with the PCB Ref. 8708300244?
What supply voltage does the boiler's PCB accept?
Does this PCB work for the boiler ZW24KE23S2895?
What fault code is documented for this PCB?
What is the reference for this PCB?
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