Junkers PCB 8 748 300 246 · B 748 301 110 for ZW20 KD
It is the printed circuit board of the electrical control assembly of the ZW20 KD: it is located in the control box and is involved in the operation and safety control. A shutdown does not indicate that the board is faulty: it is necessary to distinguish between electrical supply, circulation, and the operation of the safety devices.
- Type of part
- Junkers
- Status
- Refurbished
- Catalogue reference
- 8 748 300 246
- Warranty
- 1 year
VAT included Stock · 5 units
Boilers Junkers compatible with reference 8 748 300 246
Junkers con referencia 8 748 300 246. Una compatibilidad contrastada: Junkers ZW20 KD. Hay otros 3 modelos que todavía estamos comprobando.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZW20 KD | Junkers | Contrasted |
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Junkers ZW20-1KD23 | Junkers | Unconfirmed |
|---|---|---|
| Junkers Eurostar-Hit | Junkers | Unconfirmed |
| Junkers ZW 20 KD 23 | Junkers | Unconfirmed |
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 reference 8 748 300 246 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Compare the reference of the installed PCB with 8 748 300 246.
- Check on the rating plate that your boiler is a Junkers ZW20 KD (or ZW 20 KD 23). The ZW 20 KE and the ZW 20 AME have a different plate: 8 748 300 371.
- Compare the connectors and the version of your device: the parts list does not specify all the serial numbers or gas variants.
- If they match, call us at 911 17 77 77 with the model of your boiler.
Symptoms that require diagnosis in the junkers 8 748 300 246
Common symptoms and faults
- 01
The burner shuts off shortly after starting.
Cause: Check the circulation and the operation of the pump before attributing it to the PCB.
- 02
The boiler heats, but the radiators remain cold.
Cause: Distinguish closed radiator valves from a circulation fault.
- 03
A version with gas control S..9.. turns off.
Cause: The flue gas safety can act: it requires technical inspection and should not be bypassed.
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 sheet: Junkers 8 748 300 246
- Catalogue reference
- 8 748 300 246
- Uniclima internal SKU
- PLBO073
- Brand
- Junkers
- Type of part
- Junkers
- Units in stock
- 5 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.
- Spare part brand
- Junkers
- Documented reference
- 8 748 300 246
- Type of part
- PCB
- Documented application
- ZW20 KD
- Set / position of parts breakdown
- 06 / 5
- internal SKU
- PLC206
- Inventory — Application indicated in inventory
- ZW 20 KD 23
- Inventory — Visible electrical marking on subcomponent
- 250 V
- Inventory — Subcomponent condenser
- 0.1 μF K 275V~
- Inventory — Subcomponent marking
- 100nJ63
- Official spare parts list ZW20 KD — Assembly · position
- 06 control box · 5 PCB · Official list
- Official spare parts list ZW20 KD — Fuses from the box
- 1.25 A (1 904 522 338) · 2.5 A (1 904 521 342) · Official list
- Official spare parts list ZW20 KD — Box transformer
- 8 747 201 254 · Official list
- Ficha de — Código EAN / GTIN
- 4010009533481 · letona +
- compatible with reference — Junkers ZW20 KD
- 8 748 300 246 · PCB; electrical assembly 06, position 5
- Technical sheet: Brand of the spare part
- Junkers
- Technical sheet: documented reference
- 8 748 300 246
- Technical sheet: Type of spare part
- PCB
- Technical sheet: Documented application
- ZW20 KD
- Technical sheet: Assembly / parts layout
- 06 / 5
- Ficha técnica — SKU interno
- PLC206
- Diagnosis — The burner shuts off when there is a power outage.
- The disconnection may be the intended action of the safety relay, not a fault of the PCB.
- Diagnosis — The burner shuts off shortly after starting.
- Check the circulation and operation of the pump before attributing it to the PCB.
- Diagnosis — The boiler heats, but the radiators remain cold.
- Distinguishing closed radiator valves from a circulation fault.
- Diagnosis — A version with gas control S..9.. turns off.
- The flue gas safety may be activated. It requires technical inspection; it should not be bypassed.
- Inventory data — Application indicated in inventory
- ZW 20 KD 23
- Inventory data — Visible electrical marking on subcomponent
- 250 V
- Inventory data — Subcomponent condenser
- 0.1 μF K 275V~
- Inventory data — Subcomponent marking
- 100nJ63
- Pending applications to verify
- ZW 20 KD 23 — compatibilidad anotada; pendiente de confirmar por variante.
Before purchasing
- Por confirmar: Junkers ZW20-1KD23
- Por confirmar: Junkers Eurostar-Hit — ( rusa), como nombre de serie sin modelo
- Not compatible or excluded from origin: Junkers ZW 20 KE — It has a different PCB: 8 748 300 371 (official list)
- Not compatible or excluded by origin: Junkers ZW 20 AME — It has a different PCB: 8 748 300 371 (official list)
- Do not confuse: 8 748 300 371 — PCB of the Junkers ZW 20 KE and ZW 20 AME — Another PCB: the ZW20 KD uses 8 748 300 246.
- Do not confuse: 8 717 207 346 — Control box of the ZW20 KD — It is the box where the PCB goes, not the PCB.
- Do not confuse: 1 904 522 338 · 1 904 521 342 — 1.25 A and 2.5 A fuses from the box — They are fuses, not the PCB.
- El código del circuito B 748 301 110 no figura en la lista oficial ni en: para pedir o comparar, usa 8 748 300 246.
- El código 8 748 300 246 está unido a la ZW20 KD por la lista oficial de recambios y (Letonia, Ucrania y Rusia). El código del circuito B 748 301 110 lo aporta .
- Aplicaciones registradas pendientes de confirmar por modelo, variante o programación: Junkers ZW 20 KD 23.
Frequently asked questions: junkers 8 748 300 246
How do I know if it's the PCB 8 748 300 246 of my Junkers ZW20 KD?
Look for the reference 8 748 300 246 on the installed PCB. The official spare parts list for the ZW20 KD lists it as Leiterplatte, assembly 06 (control box), position 5.
Is it compatible with my Junkers ZW20 KD?
Comprueba el estado de cada modelo en los apartados de compatibilidad; las variantes pendientes no están validadas. registrada: para la ZW20 KD y para la ZW 20 KD 23. Para la ZW20 KD la dan además la lista oficial de recambios y (Letonia, Ucrania y Rusia); para la ZW 20 KD 23, de Hungría. Compara igualmente los conectores y la versión de tu aparato.
Is it compatible with the Junkers ZW 20 KE or the ZW 20 AME?
Comprueba el estado de cada modelo en los apartados de compatibilidad; las variantes pendientes no están validadas. No. Las listas oficiales de recambios de la ZW 20 KE y de la ZW 20 AME llevan otra placa, la 8 748 300 371, y no incluyen la 8 748 300 246. Nuestra ficha tampoco la extiende a ZW20-1 KD, ZW20-2 KD ni ZS20 KD: son denominaciones distintas. Si es tu caso, envíanos desde Contacto una foto de la placa de características.
Does it also work for the ZW20-1KD23, the Eurostar-Hit, or other boilers?
Comprueba el estado de cada modelo en los apartados de compatibilidad; las variantes pendientes no están validadas. Por confirmar. da el código 8748300246 para la ZW20-1KD23 y rusa lo lista para «ZW20KD, Novatherm y Eurostar-Hit», nombres de serie sin modelo. Con una sola cada una, no llegan a las tres independientes que pedimos. Envíanos desde Contacto una foto de la placa de características.
What do 8 748 300 246, 8748300246, 87483002460, and B 748 301 110 mean?
Los tres primeros son la misma pieza escrita de formas distintas: la lista oficial usa 8 748 300 246; de Hungría, Ucrania y Rusia, 8748300246; y de Letonia y Hungría, 87483002460 (8 748 300 246 0). B 748 301 110 es el código del circuito impreso, dato que no figura en la lista oficial ni .
What else is included in the control box of the ZW20 KD?
According to the official list, set 06 includes the control box (8 717 207 346, position 1), the PCB (8 748 300 246, position 5), two fuses (1.25 A: 1 904 522 338; 2.5 A: 1 904 521 342), and a transformer (8 747 201 254). They are different parts: do not confuse their codes with that of the PCB.
Can I install it myself?
Lo recomendable es que la cambie un técnico, porque es la placa de mando de una caldera de gas. la sustitución exige un diagnóstico previo: que la caldera se apague no demuestra que la placa esté mala, pueden influir la alimentación eléctrica, la circulación o las seguridades.
Is reference 8 748 300 246 documented for the ZW20 KD?
Yes. It is identified as the PCB of the electrical assembly 06, position 5. The selection for a specific unit also requires comparing its version and the installed reference.
Does this PCB work for any Junkers ZW20?
Comprueba el estado de cada modelo en los apartados de compatibilidad; las variantes pendientes no están validadas. No se puede extender esa aplicación a toda la familia. ZW20 KD y las variantes con -1, -2, KE o AME no son la misma denominación. Esta ficha acredita únicamente la aplicación ZW20 KD descrita.
If the boiler turns off, do I need to change the PCB?
Comprueba el estado de cada modelo en los apartados de compatibilidad; las variantes pendientes no están validadas. No por ese síntoma aislado. La falta de corriente, un problema de circulación o una actuación de seguridad pueden provocar un apagado. El técnico debe identificar la causa antes de sustituir el recambio.
Junkers PCB 8 748 300 246 · B 748 301 110 for ZW20 KD