Hermann Micra 2 Ignition Transformer - Honeywell AC1A114 - Ref. 52004120
Ignition transformer for Hermann boilers. It generates the high voltage necessary to produce the spark that ignites the burner. According to the label, it operates at 230V, 50-60Hz, with a working temperature range of -20 to 90 degrees C. The replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not ignite due to lack of spark or a fault code related to ignition.
- Type of part
- Transformers
- Status
- Refurbished
- Catalogue reference
- 52004120
- Warranty
- 1 year
Hermann boilers compatible with reference 52004120
Ignition transformer with reference 52004120. Seven verified compatibilities: 2 and Master.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann 2 | Habitat | Contrasted |
| Hermann Master | Master | Contrasted |
| Hermann 2 | Micra | Contrasted |
| Hermann Oberon | Oberon | Contrasted |
| Hermann Thesi | Thesis | Contrasted |
| Hermann Atlas | Tiberis | Contrasted |
| Hermann Triton | Triton | 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. 52004120 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 52004120. 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 that require diagnosis in the ignition transformer 52004120
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 ignite and there is no spark at the electrode, although the fan and gas are functioning normally.
Cause: The transformer does not deliver the high voltage needed by the electrode to produce the spark.
With the fan and gas operating, check the electrode and its cable.
- 02
There is a fault or ignition lockout while everything else is in order.
Cause: If a flame is not detected within the safety time, the control unit cuts off the gas and displays the warning.
Check the electrode tip spacing and ensure there is no soot; if it is fine, then suspect the transformer.
- 03
The spark is intermittent or weak at the electrode.
Cause: A damaged winding in the transformer causes irregular discharges instead of a steady spark.
Check the ground connection of the burner before replacing the coil: a poor ground can cause the same effect.
- 04
The ignition fault mainly occurs during cold starts, early in the morning.
Cause: The condensation humidity accumulated overnight can cause the transformer to lose voltage or divert the spark to ground.
If the fault occurs more frequently during the first start of the day, check for visible moisture in the area of the transformer and the electrode.
Hermann fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 01 | Ignition fault / incorrect combustion. | Defective ignition transformer (accenditore): it does not supply high voltage to the electrodes, there is no spark, and the electronics do not detect a flame, resulting in a lockout with 01. Check for the presence of a spark at startup, power supply to the accenditore, and continuity of the HT cable/electrode. |
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.
Hermann 52004120 ignition transformer datasheet
- Catalogue reference
- 52004120
- Uniclima internal SKU
- TECHM2
- Brand
- Hermann
- Type of part
- Transformers
- Units in stock
- 6 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
- Model
- AC1A114
- Voltage
- 230V
- Frequency
- 50-60Hz
- Temperature range
- -20/90°C
- The manufacturer of the transformer is Honeywell; Hermann is the manufacturer of the boiler, not the component.
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Hermann Triton manual (PDF) Document © Hermann, provided as a technical reference.
Frequently asked questions about the ignition transformer 52004120
Who manufactures the ignition transformer for the Hermann Micra 2 boiler?
What voltage does the Honeywell AC1A114 transformer of the Hermann Micra 2 operate at?
What is the operating temperature range of the transformer Ref. 52004120?
In which Hermann boilers other than the Micra 2 is this transformer installed?
What fault indicates that the ignition transformer of the Hermann Thesi needs to be replaced?
Spare parts related to Hermann Habitat
