Honeywell Ignition Transformer AC1A114 - Hermann Micra 2 24 E

Honeywell ignition transformer model AC1A114, used in Hermann boilers from the Micra, Master Condensing, Spazio Zero, and Thesi series. It generates the high voltage that jumps to the electrode to ignite the burner. According to the label, it operates at 230 V, 50-60 Hz, with an ambient temperature range of -20 to 90°C. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not ignite or loses spark.

Type of part: Transformers
Status: Refurbished
internal SKU: TECM224E
Warranty: 1 year

VAT included Stock · 3 units

Compatibility

Compatible Hermann boilers

Ignition transformer. Seven confirmed compatibilities: Master Condensing 26 and Micra 2 24 E.

Proven compatibility

Boiler model	Family	Verification
Hermann Master Condensing 26	Hermann	Contrasted
Hermann Micra 2 24 E	Hermann	Contrasted
Hermann Micra 2 24 SE	Hermann	Contrasted
Hermann Micra Condens 26	Hermann	Contrasted
Hermann Micra Condensing 26	Hermann	Contrasted
Hermann Spazio Zero Condensing 26	Hermann	Contrasted
Hermann Thesi Condensing 26/32	Hermann	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 it 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 —. If it is not visible, do not identify the part by 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

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, but the burner does not light.
Cause: The transformer does not generate the high voltage necessary for the electrode to produce the spark.
Check that the high voltage cable is not cracked or disconnected from the electrode or the transformer.
02
There is no spark visible or audible at the ignition electrode.
Cause: If the transformer has no output voltage, the electrode cannot generate an arc, even if the gas reaches the burner.
With the boiler turned off, check that the electrode is not dirty with soot or broken before considering that the transformer is faulty.
03
The boiler locks out after attempting to start, displaying an ignition fault.
Cause: The control unit stops the cycle if it does not detect flame ionization, and without a spark from the transformer, the flame does not occur.
Reset the boiler and observe if the fault occurs at the same moment in the cycle; if so, it is more likely to be the transformer and not a one-time fault.
04
The spark jumps weakly or irregularly, not always on every attempt.
Cause: A transformer with damaged winding loses capacity and does not produce a stable discharge in each cycle.
Check that the mains voltage reaching the transformer is correct and stable before replacing it.

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

Hermann ignition transformer datasheet

Uniclima internal SKU: TECM224E
Brand: Hermann
Type of part: Transformers
Units in stock: 3 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.

manufacturer: Honeywell
type: AC1A114
voltage: 230 V ~
frequency: 50-60 Hz
Ambient temperature range: TA -20/90°C (first character cut off by the angle of the photo)
Manufacturing date: 18/...

Frequently Asked Questions

Frequently asked questions about the ignition transformer

Who manufactures the ignition transformer for the Hermann Micra 2 24 E?

Honeywell, model AC1A114, according to the label.

Does this Honeywell AC1A114 transformer also work for a Hermann Master Condensing 26?

Yes, the Master Condensing 26 is on the list of compatible boilers, along with the Micra, Spazio Zero, and Thesi Condensing series.

What voltage does the ignition transformer of the Hermann Micra Condens 26 operate at?

A 230 V, 50-60 Hz, according to the label.

Is this transformer the same model as Ref. 52004120 of the Hermann Micra 2 standard?

Both share the manufacturer code Honeywell AC1A114, but this data sheet, unlike Ref. 52004120, does not have its own store reference indicated.

Spare parts related to Hermann Hermann

Honeywell Ignition Transformer AC1A118 - Hermann Micra Condens 26 / Master / Spazio Zero / Thesi 26-32 / Acquaplus 32 Hermann

Ignition Transformer HEZ Hermann Micra Condens 26 Ref. H052005087 Hermann

Hermann Micra 2 Ignition Transformer - Honeywell AC1A114 - Ref. 52004120 Hermann

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Honeywell Ignition Transformer AC1A114 - Hermann Micra 2 24 E