Honeywell PCB S4561D Neckar Novastar New 24AE 31
RefurbishedNeckarPCBs (control boards)Honeywell

Honeywell PCB S4561D Neckar Novastar New 24AE 31

Stock · 4 units

The Honeywell S4561D PCB of the Neckar Novastar New 24AE 31 boiler controls the ignition, burner modulation, pump, and safety features of the boiler. If it fails, the boiler may not start, lock out, or operate erratically. The user may notice that the reset button blinks at 0.5 Hz along with an LED indicating 75 °C, which means that ionization signal is detected but the burner does not ignite, or it blinks at 4 Hz, indicating a control or safety fault. This PCB is installed in several boilers from the Junkers Euroline ZW, ZS, and NW24 ranges, among others. It is recommended to replace it if these fault symptoms are present.

VAT included

Compatibility

Neckar boilers compatible with reference 87083002120

PCB with reference 87083002120. 22 verified compatibilities: ZW23-1AE23 and ZW23-1AE31.

Proven compatibility

Boiler modelFamilyVerification
Neckar ZW23-1AE23Junkers Euroline ZW (combi)Contrasted
Neckar ZW23-1AE31Junkers Euroline ZW (combi)Contrasted
Neckar ZW23-1KE23Junkers Euroline ZW (combi)Contrasted
Neckar ZW23-1KE31Junkers Euroline ZW (combi)Contrasted
Neckar ZW24-1ELH AE23Junkers Euroline ZW (combi)Contrasted
Neckar ZW24-1ELH AE31Junkers Euroline ZW (combi)Contrasted
Neckar ZW28-1LHKE23Junkers Euroline ZW (combi)Contrasted
Neckar ZW28-1LHKE31Junkers Euroline ZW (combi)Contrasted
Neckar ZW30-1LHAE23Junkers Euroline ZW (combi)Contrasted
Neckar ZW30-1LHAE31Junkers Euroline ZW (combi)Contrasted
Neckar ZS23-1AE23Junkers Euroline ZS (heating only)Contrasted
Neckar ZS23-1AE31Junkers Euroline ZS (heating only)Contrasted
Neckar ZS23-1KE23Junkers Euroline ZS (heating only)Contrasted
Neckar ZS23-1KE31Junkers Euroline ZS (heating only)Contrasted
Neckar NW24-1LHAE23Junkers Euroline NW24Contrasted
Neckar NW24-1LHAE31Junkers Euroline NW24Contrasted
Neckar NW24-1LHKE23Junkers Euroline NW24Contrasted
Neckar NW24-1LHKE31Junkers Euroline NW24Contrasted
Neckar NW24/28-1LHKE23Junkers Euroline NW24Contrasted
Neckar NW24/28-1LHKE31Junkers Euroline NW24Contrasted
Neckar NW24/30-1LHAE23Junkers Euroline NW24Contrasted
Neckar NW24/30-1LHAE31Junkers Euroline NW24Contrasted

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

Guide

How to check if ref. 87083002120 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 87083002120. If it is not visible, do not identify the part by 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 87083002120 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 or show any signs, it is completely off.

    Cause: The PCB does not receive or distribute power to the rest of the system.

    Measure with the multimeter that the PCB receives 230V and check that the internal fuse is not blown.

  • 02

    The burner attempts to ignite, a few seconds pass, and the boiler locks out for safety.

    Cause: The PCB has a safety time to detect the flame; if it does not detect it in time, it cuts off the gas.

    Check the flame detection electrode and its wiring; if they are dirty or misaligned, they can cause the same symptom without the PCB being faulty.

  • 03

    The PCB indicators are flashing with a code that doesn't match any in the manual, or they are flashing continuously.

    Cause: This indicates a fault in the control microprocessor, which emits a signal that does not match the normal codes.

    Count the blinks calmly and compare them with the manufacturer's fault code table before considering that the PCB is defective.

  • 04

    The boiler does not respond to temperature changes from the thermostat, even though it is working fine.

    Cause: The communication between the PCB and the thermostat has stopped working.

    Try bridging the demand at the terminals of the PCB; if it starts like this, the fault is with the thermostat or its wiring.

Fault codes for Neckar that this part resolves.

CodeFaultDiagnosis and solution
Reset button flashing 0.5 Hz + LED 75 °CDuring ignition: ionisation signal is detected but the burner does not ignite.The printed circuit board (PCB 87083002120) may fail in the detection/ionisation path or be damp, causing false flame or lack of spark; check ionisation microamperage, wiring, and moisture/oxidation on the PCB before replacing it.
Reset button flashes at 4 Hz (four times per second)Control/safety fault (encoder/sensors) including possible PCB defect.Fault in the PCB (Eurotronic/PCB) in managing inputs/power supplies; check voltages at ST2 (L–N/LR–N), fuses F1/F2, and 5 V to sensors. If everything is correct and the symptom persists, replace the 87083002120.

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 Neckar 87083002120

Catalogue reference
87083002120
Brand
Neckar
Type of part
PCBs (control boards)
Units in stock
4 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.

Component code (Honeywell)
S4561D
Safety time (Ts)
50 s
Batch code
1027
Before purchasing
  • The number 1027 printed next to the code seems to be a batch code or a week/year of manufacture, not the sales reference.
Frequently Asked Questions

Frequently asked questions about the PCB 87083002120

Who manufactures the S4561D PCB for the Neckar Novastar New 24AE 31?
Honeywell, according to the logo and the code S4561D silk-screened on the PCB.
What does the number 1027 on the Honeywell S4561D PCB mean?
It is a batch code or week/year of manufacture, not the sales reference.
Is this PCB compatible with the Junkers ZW28-1LHKE23 boiler?
Yes, the S4561D PCB is compatible with ZW28-1LHKE23, as well as with other models in the compatibility table.
How many models are compatible with the S4561D PCB?
The S4561D PCB is compatible with a total of 22 models from the specified ranges.
What safety time is indicated on the S4561D PCB silkscreen?
Marks Ts = 50 s (safety time).
What is the reference for the Honeywell PCB for the Neckar Novastar New 24AE 31?
The reference is PLN24AE.

Spare parts related to Neckar Junkers Euroline ZW (combi)

Delivery 1–2 daysworking days, mainland Spain
1-year warrantyreviewed and tested
14-day returnuninstalled parts
Technical supportwe verify your model
Honeywell PCB S4561D Neckar Novastar New 24AE 31