Transformer ES746033 For Saunier Duval Boiler SDHV 19
Transformer ES746033 for Baxi Roca boiler SDHV 19. This part is an ignition transformer that generates the spark needed to ignite the burner. If it fails, you will notice that the boiler tries to start but cannot ignite the flame, which may lead to a potential lockout. This transformer is compatible with the Baxi Roca boiler SDHV 19, among others. It should be replaced when the mentioned symptoms occur or when the boiler does not start correctly.
VAT included
Consult via WhatsAppCompatible Saunier Duval boilers
Ignition transformer. A proven compatibility: Duval SDHV 19.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Duval SDHV 19 | Saunier | 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 it 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 —. 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.
Symptoms and faults that the ignition transformer 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, but the burner does not light.
Cause: The transformer does not provide the high voltage necessary for a spark to jump at the electrode.
Check the electrode and the high voltage cable before assuming that the transformer is the problem.
- 02
The boiler locks out with an ignition fault after several attempts.
Cause: The control unit cuts off the gas for safety reasons when it does not detect a flame after several attempts.
Unlock the boiler and repeat the cycle, paying attention to whether the fault occurs at the same step each time.
- 03
The ignition fails more when the boiler is cold and improves when it is running.
Cause: A winding that degrades performs worse in cold conditions before completely failing.
Note under what conditions it fails (cold or hot) and check the transformer connections before replacing it.
- 04
Do you notice a crackling or strange arc near the burner when trying to ignite?
Cause: A high voltage leak due to damaged insulation of the transformer generates arcs outside the electrode.
Visually inspect the transformer and wiring for cracks, moisture, or burn marks.
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.
Saunier Duval ignition transformer datasheet
- Brand
- Saunier Duval
- Type of part
- Transformers
- Units in stock
- 1 unit
- 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.
- part code
- ES746033 (alternative reading registered: ES745033)
- variant code
- 0A19 M
