PCB for Boiler ZW24AE23 and Others Ref. 8708300244
Refurbished Junkers PCBs (control boards)

PCB for Boiler ZW24AE23 and Others Ref. 8708300244

The PCB for boiler ZW24AE23, 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 fault code 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. A technician must confirm through diagnosis whether it needs to be replaced if these fault symptoms occur.

Type of part
PCBs (control boards)
Status
Refurbished
Catalogue reference
8708300244
Warranty
1 year
VAT included Stock · 2 units
Compatibility

Junkers 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 modelFamilyVerification
Junkers ZW 24 AE 23Ceraclass MidiContrasted
Junkers ZW 24 AE 23 S2805Ceraclass MidiContrasted
Junkers ZW 24 AE 31 S2805Ceraclass MidiContrasted
Junkers ZW 24 KE 23 S2895Ceraclass MidiContrasted
Junkers ZW 24 KE 31 S2895Ceraclass MidiContrasted
Junkers ZW 24-2E DV AE 23 S2Ceraclass MidiContrasted
Junkers ZW 24-2E DV AE 31 S2Ceraclass MidiContrasted

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

Guide

How to check if ref. 8708300244 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

  1. 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.
  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 that require diagnosis on the PCB 8708300244

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.

Junkers fault codes that require diagnosis

CodeFaultTechnical checks
F0Internal 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.

Technical data

Data sheet for the Junkers 8708300244 PCB.

Catalogue reference
8708300244
Uniclima internal SKU
PECJZW35
Brand
Junkers
Type of part
PCBs (control boards)
Units in stock
2 units
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.

Selectable power supply voltage
230/110V
Secondary voltage (low voltage circuit)
24V
Frequently Asked Questions

Frequently asked questions about the PCB 8708300244

Is the PCB Ref. 8708300244 compatible with the boiler ZW24AE23?
Yes, it is on the list of compatible boilers, along with other models from the Ceraclass Midi range.
What boiler models are compatible with the PCB Ref. 8708300244?
The PCB is compatible with the following models: ZW 24 AE 23, ZW 24 AE 23 S2805, ZW 24 AE 31 S2805, ZW 24 KE 23 S2895, ZW 24 KE 31 S2895, ZW 24-2E DV AE 23 S2, and ZW 24-2E DV AE 31 S2.
What supply voltage does the boiler's PCB accept?
The PCB is selectable between 230 V and 110 V, with a secondary circuit of 24 V, as printed on the circuit itself.
Does this PCB work for the boiler ZW24KE23S2895?
Yes, it is listed among the compatible boilers along with other models from the Ceraclass Midi range.
What fault code is documented for this PCB?
The documented fault code for this PCB is F0.
What is the reference for this PCB?
PECJZW35 is Uniclima’s internal SKU for locating this listing. To confirm compatibility, check the manufacturer’s reference and the exact appliance model.

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PCB for Boiler ZW24AE23 and Others Ref. 8708300244