ERA Transformer For Junkers/Bosch ZWR 24-3 - Ref. 87472013020

When you open the hot water tap, the ERA transformer for Junkers/Bosch ZWR 24-3 - Ref. 87472013020 activates to generate the spark that ignites the burner. If this part fails, you will notice that the boiler attempts to start repeatedly without being able to ignite the flame, which can lead to a lockout. This transformer is compatible with several models in the Junkers range, such as the Cerastar ZR 18-3 KE/AE and the Suprastar KS/KSN/KNH/KNS -7 E, among others. Replacement is necessary when you experience these ignition problems.

Type of part: Transformers
Status: Refurbished
Catalogue reference: 87472013020
Warranty: 1 year

VAT included Stock · 7 units

Compatibility

Junkers boilers compatible with reference 87472013020

Ignition transformer with reference 87472013020. Seven confirmed compatibilities: Cerastar ZR 18-3 KE/AE and Cerastar ZR 24-3 KE/AE.

Proven compatibility

Boiler model	Family	Verification
Junkers Cerastar ZR 18-3 KE/AE	Junkers	Contrasted
Junkers Cerastar ZR 24-3 KE/AE	Junkers	Contrasted
Junkers Cerastar ZSR 18-3 KE/AE	Junkers	Contrasted
Junkers Cerastar ZSR 24-3 KE/AE	Junkers	Contrasted
Junkers Cerastar ZWR 18-3 KE/AE	Junkers	Contrasted
Junkers Cerastar ZWR 24-3 KE/AE	Junkers	Contrasted
Junkers Suprastar KS/KSN/KNH/KNS -7 E	Junkers	Contrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

Guide

How to check if the ref. 87472013020 is the part for your boiler

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

Find the reference printed on the installed part and check whether it matches the catalogue reference 87472013020. 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.

Diagnosis and fault codes

Symptoms that require diagnosis in the ignition transformer 87472013020

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 tries to ignite, you hear a click but the spark does not jump.
Cause: The transformer does not generate enough voltage to produce the ignition arc in the electrode.
With the boiler off, check if there is a visible spark at the electrode when ordering the ignition, before changing the transformer.
02
It smells like gas for a few seconds and then the boiler locks out with a ignition fault.
Cause: The gas is coming out but it does not ignite because the transformer is not delivering the high voltage pulse to the electrode.
Check that the high voltage cable of the electrode is not cracked or shorting against the casing before replacing the transformer.
03
An electrical buzzing is heard in the ignition box area when trying to start.
Cause: A transformer that starts to fail can generate an audible hum without producing a spark.
Check if the buzzing stops when you disconnect the transformer, to rule out that the noise is coming from another component.
04
The flame ignites, but the boiler shuts down after a few seconds, repeating the attempt several times.
Cause: A weak or intermittent spark from a faulty transformer ignites the flame irregularly, and the control unit shuts off for safety.
Clean and check the distance of the ignition electrode before confirming the replacement of the transformer.

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 data sheet Junkers 87472013020

Catalogue reference: 87472013020
Uniclima internal SKU: TJZWR243
Brand: Junkers
Type of part: Transformers
Units in stock: 7 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.

Component manufacturer: ERA
OEM reference Bosch/Junkers: 87472013020

Before purchasing

The manufacturer marked on the part is ERA, not Junkers or Bosch; the reference 87472013020 is the OEM numbering used by Bosch/Junkers for this transformer.

Frequently Asked Questions

Frequently asked questions about the ignition transformer 87472013020

Who manufactures this transformer for the Junkers ZWR 24-3?

The logo printed on it is ERA; the reference 87472013020 corresponds to the OEM numbering Bosch/Junkers, confirmed by two independent sources.

Is this ERA transformer compatible with the Bosch ZSR 24-3?

Yes, it is on the list of compatible boilers along with the ZR, ZWR, and KS/KSN/KNH -7 E/EC ranges.

Is this ERA transformer suitable for the Junkers ZWR18-3?

Yes, it is listed as compatible with ZWR18-3, within the ZWR .. -3 KE/AE range that covers this part.

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1-year warranty reviewed and tested

14-day return uninstalled parts

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ERA Transformer For Junkers/Bosch ZWR 24-3 - Ref. 87472013020