How do I know if this ignition transformer is for my boiler?

Verify the reference 51704 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Saunier Duval piece.

The ignition transformer generates the high voltage for the electrode spark.

Is there no spark or repeated ignition faults?

No spark at the electrode despite having gas.

Which models is it suitable for?

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Installation and recommendations

Check the electrode and the high voltage cable.

What does refurbished mean and what coverage does it have?

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

RefurbishedSaunier Duval Transformers

Saunier Duval Themis 223 ME Electronic Ignition Box Ref. 51704

Name: Saunier Duval Themis 223 ME Electronic Ignition Box Ref. 51704
Brand: Saunier Duval
SKU: TET223
Price: 15 EUR
Availability: InStock

15 €VAT includedIn stock · 5 units

Ignition transformer: refurbished spare part that generates high voltage for the spark of the electrodes. Useful if there is no spark or ignition failures are repeated. Compatible with Themis 223 ME, Themis 625 ME (ref. 51704). Includes a one-year warranty and delivery within 2–4 working days in the EU.

Consult via WhatsApp

Not sure if it's your part? Send us a photo of the screen printing via WhatsApp and we'll confirm compatibility before you purchase.

Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: 51704
Brand: Saunier Duval
Type of part: Transformers
Available units: 5 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. 51704) equips these models. Verified compatibility; check the reference before purchasing.

Saunier Duval

Themis 223 ME
Themis 625 ME

How do I know if this ignition transformer is for my boiler?: Verify the reference 51704 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part. It is a Saunier Duval piece.
What is it used for?: The ignition transformer generates the high voltage for the electrode spark.
Is there no spark or repeated ignition faults?: No spark at the electrode despite having gas.
Which models is it suitable for?: Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations: Check the electrode and the high voltage cable.
What does refurbished mean and what coverage does it have?: Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Saunier Duval Themis 223 ME Electronic Ignition Box Ref. 51704

Key Data

Saunier Duval

Spare Parts Related Boiler Themis 223 ME