Ignition Transformer Era - Junkers ZW20-1 AME KE - Ref. 87472012720
In Junkers boilers, the Ignition Transformer - Junkers ZW20-1 AME KE - Ref. 87472012720 generates the spark needed to ignite the burner. If this part fails, you will notice that the boiler will attempt to start without achieving a flame, which will cause the reset button to blink at 1 Hz, indicating an ignition fault. It is compatible with models such as Novastar ZW20-1 AME, Novastar ZW20-1 KE, Novatherm ZW20-1 AME, among others. It is recommended to replace it when you observe these failure symptoms.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 87472012720
Ignition transformer with reference 87472012720. Seven verified compatibilities: Novastar ZW20-1 AME and Novastar ZW20-1 KE.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers Novastar ZW20-1 AME | Junkers | Contrasted |
| Junkers Novastar ZW20-1 KE | Junkers | Contrasted |
| Junkers Novatherm ZW20-1 AME | Junkers | Contrasted |
| Junkers Novatherm ZW20-1 KE | Junkers | Contrasted |
| Junkers Novatherm ZW20-1 KD | Junkers | Contrasted |
| Junkers Novastar ZW20 AME | Junkers | Contrasted |
| Junkers Novastar ZW20 KE | 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.
How to check if ref. 87472012720 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.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 87472012720. 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.
Symptoms and faults that the ignition transformer 87472012720 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 tries to ignite several times in a row but fails to produce a flame.
Cause: The transformer does not generate the spark necessary to ignite the gas, so the boiler repeats the attempt.
Look through the peephole to see if there is a visible spark at the electrode during the attempt; if there isn't, check the ignition wiring.
- 02
A weak or almost inaudible spark can be heard when starting.
Cause: The transformer is damaged and does not provide enough power, which causes a weak spark.
Check that the electrode is not covered in soot and that the tip is not worn, as this can also dampen the spark.
- 03
The boiler locks out due to ignition failure after attempts.
Cause: The control unit cuts off the gas because it does not detect a flame within the established time, for safety reasons.
Check the ground connection of the burner; a loose ground can cause the same lockout as a faulty coil.
- 04
The fault occurs more with the cold boiler than with the hot boiler, or vice versa.
Cause: Humidity in the transformer affects more in cold conditions, causing spark leaks to ground.
If the fault occurs more frequently during cold starts, check for condensation or damp dirt around the transformer before replacing it.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| The reset button flashes at 1 Hz (once per second) | Ignition fault. | Ignition transformer fault: it does not supply high voltage to the spark plugs and there is no spark; the control exhausts the safety time without flame and locks out. Verification: check for spark at the electrodes; measure continuity/insulation of the transformer and check fuse/power supply according to the electrical test in the manual. |
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.
Junkers 87472012720 ignition transformer datasheet
- Catalogue reference
- 87472012720
- 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.
- Actual manufacturer
- was
- Core type
- Typ EI 60/30.5 (equivalent was BV 060-0285.0)
- The actual manufacturer of the transformer is era; Junkers/Bosch is the brand of the boiler that assigns the commercial reference 87472012720, not the manufacturer of the component.
Frequently asked questions about the ignition transformer 87472012720
Who actually manufactures the transformer of the Junkers ZW20-1 AME KE?
Does this transformer also work for a Junkers ZW20-2 KE23 S2895?
Why is the reference 87472012720 from Junkers if the transformer is manufactured by Era?
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