Vaillant Ignition Transformer VMI 32/362-7 Ref. 287450
If your boiler does not ignite and shows starting faults, the Vaillant VMI 32/362-7 Ignition Transformer may be the solution. This part is responsible for generating the spark needed to ignite the burner. When it fails, you will notice that the boiler attempts to start unsuccessfully, which can lead to fault codes F.28 and F.29. It is compatible with various boilers from the Vaillant brand, such as the VMI 280-7 and VMI 282-7 models, among others. It is recommended to replace it if you observe ignition problems or if the boiler locks out after several attempts.
VAT included
Consult via WhatsAppVaillant boilers compatible with reference 287450
Ignition transformer with reference 287450. 12 verified compatibilities: VMW ES 242/3 and VMW 242-3.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Vaillant VMW ES 242/3 | Vaillant Turbo Tec / Turbo Pro (VMW) | Contrasted |
| Vaillant VMW 242-3 | Vaillant Turbo Tec / Turbo Pro (VMW) | Contrasted |
| Vaillant VMW 242-5 | Vaillant Turbo Tec / Turbo Pro (VMW) | Contrasted |
| Vaillant VMW 240-5 | Vaillant Turbo Tec / Turbo Pro (VMW) | Contrasted |
| Vaillant VMW 282-5 | Vaillant Turbo Tec / Turbo Pro (VMW) | Contrasted |
| Vaillant VM 242-5 | Vaillant Atmo Tec / VM (heating only) | Contrasted |
| Vaillant VM 282-5 | Vaillant Atmo Tec / VM (heating only) | Contrasted |
| Vaillant VC 242 E | Vaillant VC / VCM (combi-compact) | Contrasted |
| Vaillant VCM 242 E | Vaillant VC / VCM (combi-compact) | Contrasted |
| Vaillant VCM 282 E | Vaillant VC / VCM (combi-compact) | Contrasted |
| Vaillant VMI 280-7 | Vaillant VMI | Contrasted |
| Vaillant VMI 282-7 | Vaillant VMI | 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. 287450 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 287450. 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 and faults that the ignition transformer 287450 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 does not ignite and the fault persists even after being reset several times.
Cause: If the transformer does not supply current, the ignition system cannot generate a spark in any attempt.
With a multimeter, check if there is current at the transformer input before concluding that the part is faulty.
- 02
The wiring or the connector of the transformer appear damaged, burnt, or loose.
Cause: This part is sold with the plate, wiring, and connector included because the fault is often in those connections as well, not just in the winding.
Visually inspect the connector and the original wiring for burns or oxidation before deciding on a complete replacement.
- 03
No arc is visible on the electrode during the ignition attempt.
Cause: Without power to the ignition circuit, there is no energy available to create the spark.
Measure the continuity of the high voltage cable to the electrode; a cut cable gives the same symptom as a faulty transformer.
- 04
The boiler always locks out during the ignition phase and never starts up.
Cause: Without power in the ignition circuit, the control board does not detect flame and blocks the cycle for safety.
Note the displayed fault code; if it matches the ignition fault and not another cause, the problem is in this circuit.
Fault codes from Vaillant that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.28 | Fault during start-up: the boiler fails to ignite the burner in the start-up phase. | The ignition transformer is part of the ignition system (transformer + cable + electrode); if the transformer fails, it does not generate the high voltage for the spark, and the boiler aborts the start-up without detecting a flame. Verify: measure the transformer's output voltage to the electrode and check for a spark at each start-up; if there is no spark and the wiring/electrode are fine, the transformer is the cause. |
| F.29 | The flame goes out during operation and re-ignition attempts fail. | The Vaillant service documentation explicitly lists "the ignition transformer has a spark fault" as the cause of F.29: if the transformer does not reignite after a flame failure, the lockout is triggered. Verify: check the spark generation of the transformer during ignition retries and rule out poor grounding, gas pressure, and condensate pipe before. |
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.
Vaillant 287450 ignition transformer datasheet
- Catalogue reference
- 287450
- Brand
- Vaillant
- Type of part
- Transformers
- Units in stock
- 4 units
- 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.
- Code printed on the component
- 287441
- Vaillant reference for the complete spare part
- 287450 (transformer + support plate + wiring + connector)
- Supplier model designation
- T601817/E
- Primary voltage
- 230V~
- Frequency
- 50/60Hz
- Secondary voltage
- 17V
- Power
- 18.4 VA
- Fuse
- 1.25 AT
- Insulation class
- II (double square symbol)
- Marked
- CE
- Batch/date
- 01.04
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Vaillant VMI 282-7 Manual (PDF)Document © Vaillant, provided as a technical reference.
Frequently asked questions about the ignition transformer 287450
Are 287441 and 287450 the same part in the transformer of the Vaillant VMI 32/362-7?
What fault indicates that this transformer needs to be replaced in a Vaillant boiler?
What voltage and power does the transformer Ref. 287450 have?
Is this transformer Ref. 287450 compatible with the Vaillant VMW 240-5 boiler?
What does the spare part Ref. 287450 include besides the transformer?
How many models are compatible with the transformer Ref. 287450?
Spare parts related to Vaillant Turbo Tec / Turbo Pro (VMW)
