ERA transformer Junkers Euromaxx ZWC 28 28 1MFK 23 Ref. 8747201358
RefurbishedJunkersTransformersERA

ERA transformer Junkers Euromaxx ZWC 28 28 1MFK 23 Ref. 8747201358

Stock · 5 units

If your boiler attempts to start without successfully igniting the flame, you may need the Junkers Euromaxx ZWC 28 28 1MFK 23 Ignition Transformer. This part is an ignition transformer that generates the spark necessary to ignite the burner. When it fails, the boiler may display the fault code F7, indicating that it does not correctly detect the flame. It is compatible with models from the Euromaxx ZWC range, such as the ZWC24/28-1MFA23, ZWC24/28-1MFA31, and ZWC28/32-1MFA23, among others. It should be replaced when this type of ignition fault occurs.

VAT included

Compatibility

Junkers boilers compatible with reference 8747201358

Ignition transformer with reference 8747201358. Six confirmed compatibilities: ZWC24/28-1MFA23 and ZWC24/28-1MFA31.

Proven compatibility

Boiler modelFamilyVerification
Junkers ZWC24/28-1MFA23Euromaxx ZWCContrasted
Junkers ZWC24/28-1MFA31Euromaxx ZWCContrasted
Junkers ZWC28/32-1MFA23Euromaxx ZWCContrasted
Junkers ZWC28/32-1MFA31Euromaxx ZWCContrasted
Junkers ZWC28-1MFA23Euromaxx ZWCContrasted
Junkers ZWC28-1MFK23Euromaxx ZWCContrasted

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

Guide

How to check if ref. 8747201358 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 8747201358. 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 and faults that the ignition transformer 8747201358 resolves.

The ignition transformer generates the high voltage for the spark of the electrodes. These are the typical symptoms and what to do:

Common symptoms and faults

  • 01

    The boiler does not respond to any button, as if it has no power.

    Cause: Without the reduced voltage provided by this transformer, the PCB does not receive power and does not start.

    Measure with a multimeter if there is mains voltage at the primary of the transformer before declaring it faulty.

  • 02

    The display flickers, restarts by itself, or shows meaningless symbols.

    Cause: An unstable low voltage output in the secondary causes resets in the control electronics.

    Check if the fault coincides with knocks or vibrations in the boiler; a loose wiring in the transformer can cause similar symptoms.

  • 03

    The boiler turns off by itself in the middle of a heating or domestic hot water cycle.

    Cause: A sudden drop in voltage on the secondary side causes the PCB to lose auxiliary power and interrupt the cycle.

    Check that the transformer connectors are properly fitted and free of oxidation before replacing it.

  • 04

    There is a burnt smell near the PCB (control board).

    Cause: A transformer in short circuit can overheat and affect nearby components.

    Cut off the power to the boiler immediately and inspect the transformer and its surroundings for dark stains or the smell of burnt plastic.

Fault codes from Junkers that this part resolves.

CodeFaultDiagnosis and solution
F7The boiler does not detect the flame correctly.An incorrect ionization signal may be due to a fault in the transformer. If the boiler does not ignite or shuts down, check the condition of the transformer, as it could be affecting the flame detection.

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

Ignition transformer datasheet Junkers 8747201358

Catalogue reference
8747201358
Brand
Junkers
Type of part
Transformers
Units in stock
5 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.

Type/model and manufacturer code
Typ EI 66/30 / BV 066-0213.0
Reference engraved on the part
8747201252
Secondary 2 (Pin 12-13)
9 V, 4.5 VA
Manufacturer
ERA
Documentation

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

Frequently Asked Questions

Frequently asked questions about the ignition transformer 8747201358

Which brand manufactures the transformer for the Junkers Euromaxx ZWC 28?
The reference unit is ERA (Type EI 66/30, BV 066-0213.0); the current reference is also available under the ACE brand, equivalent.
Which models are compatible with the transformer ERA TJEZWC28?
The transformer ERA TJEZWC28 is compatible with the following models from the Euromaxx ZWC range: ZWC24/28-1MFA23, ZWC24/28-1MFA31, ZWC28/32-1MFA23, ZWC28/32-1MFA31, ZWC28-1MFA23, and ZWC28-1MFK23.
What secondary values does the transformer of the Euromaxx ZWC 28 have?
The transformer has a secondary of 9V and 4.5VA, according to the label of the reviewed unit.
What fault code is documented for this transformer?
The documented fault code for this transformer is F7.
Is the ERA TJEZWC28 transformer compatible with other models of Junkers boilers?
This transformer is compatible only with the models listed in the compatibility table, which are 6 in total.

Spare parts related to Junkers Euromaxx ZWC

Delivery 1–2 daysworking days, mainland Spain
1-year warrantyreviewed and tested
14-day returnuninstalled parts
Technical supportwe verify your model
ERA transformer Junkers Euromaxx ZWC 28 28 1MFK 23 Ref. 8747201358