Honeywell Ignition Transformer AC1A114 - Hermann Micra Condens 26 / Master / Spazio / Thesi 26-32 / Saunier Duval Acquaplus 32

Honeywell ignition transformer, reference AC1A114, identified by the printed marking on the part. It operates at 50-60 Hz. It is installed in Hermann Micra Condens, Master, Spazio, and Thesi 26/32 boilers, as well as in the Saunier Duval Acquaplus Condensing 32. Replacement requires first confirming the fault of the part through technical diagnosis, even when the burner ignition fails due to lack of spark. The store catalog published a different reference (H052005087) that does not correspond to this part.

Type of part: Transformers
Status: Refurbished
Catalogue reference: H052005087
Warranty: 1 year

VAT included Stock · 7 units

Compatibility

Renova boilers compatible with reference H052005087

Ignition transformer with reference H052005087. A proven compatibility: Micra Condens 26.

Proven compatibility

Boiler model	Family	Verification
Renova Micra Condens 26	Micra Condens	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 ref. H052005087 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 H052005087. 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 H052005087

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 the burner even though gas is arriving normally.
Cause: The transformer has an open internal coil and does not generate the spark needed for the electrode.
With the boiler in ignition cycle, check if there is a visible spark at the electrode before replacing the transformer.
02
The spark appears intermittently, sometimes yes and sometimes no, without a clear pattern.
Cause: The connectors of the transformer or the electrode are oxidized and reduce the current reaching it without the part being broken.
Check that the connectors of the transformer and the high voltage cable are not oxidized or loose.
03
The ignition fault appears after a period of humidity or after cleaning the combustion chamber.
Cause: The condensation inherent to these boilers promotes that the high voltage is grounded before reaching the electrode.
Check the combustion chamber and the area around the electrode for moisture or accumulated condensation before replacing the transformer.
04
There is a spark at the electrode, but the burner does not ignite.
Cause: If there is a spark present, the transformer is likely functioning: the problem is in another part of the ignition circuit.
If you confirm a visible and constant spark, check the gas supply and the gas valve before replacing the transformer.

Renova fault codes that require diagnosis

Code	Fault	Technical checks
01	Ignition fault: the burner does not ignite normally or the flame does not form/extinguishes unexpectedly (steady red LED, lockout after several attempts).	The ignition transformer generates the spark that ignites the burner; if it is faulty, no spark occurs and the boiler locks with Error 01. Check: with the boiler in demand, verify if there is a spark at the electrode and measure the high voltage output of the transformer; rule out the electrode, cable, connector, and gas supply first, as this same code can be caused by other components of the ignition group.

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

Renova H052005087 ignition transformer datasheet

Catalogue reference: H052005087
Uniclima internal SKU: TERM224E
Brand: Renova
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.

Type: AC1A114
Frequency: 50-60 Hz
Manufacturing date: 89/18 (uninterpreted format)

Frequently Asked Questions

Frequently asked questions about the ignition transformer H052005087

What is the correct reference for the transformer of the Hermann Micra Condens 26, AC1A114 or H052005087?

AC1A114, engraved on the part itself; the old catalog showed H052005087, which does not correspond to this unit.

Is the AC1A114 transformer an original part from Hermann?

No, it is manufactured by Honeywell and is used as a spare part in several Hermann boilers and in the Saunier Duval Acquaplus Condensing 32.

Is this Honeywell AC1A114 transformer suitable for the Hermann Micra Condens 26?

Yes, it is one of the compatible models according to the list for this part.

Does this transformer AC1A114 also work for the Saunier Duval Acquaplus Condensing 32?

Yes, the Acquaplus Condensing 32 is on the list of compatible boilers for this part.

When should the AC1A114 transformer be replaced in a Hermann Spazio Condensing 26?

The technical diagnosis must confirm that it is necessary to replace it, even when the burner ignition fails due to lack of spark.

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Honeywell Ignition Transformer AC1A114 - Hermann Micra Condens 26 / Master / Spazio / Thesi 26-32 / Saunier Duval Acquaplus 32