Anstoss Ignition transformer HEZ-25 07000091

The Anstoss HEZ-25 07000091 ignition transformer is a component that produces the high-voltage spark needed to ignite the fuel-air mixture in a burner. During the ignition phase, the burner control energises the transformer, which steps up the mains voltage to a level sufficient to arc across the ignition electrode gap. The transformer operates only for that brief period and then de-energises once the flame is proven. This model is listed under SKU 07000091 and is part of the Anstoss brand.

Ignition transformers of this type are selected by secondary voltage and current, primary voltage (230 V is common, though 110 V and 24 V variants exist), duty cycle, mounting style, and terminal or connector pattern. The primary voltage must match the control circuit supply, and the secondary output must be adequate for the electrode gap and burner design. When replacing such a part, ensure that the mounting dimensions and connector layout match the existing assembly; a mismatch can prevent correct installation or spark delivery.

When an ignition transformer of this kind fails, the burner may fail to ignite or may ignite intermittently. Common failure modes include internal short circuits, open windings, or insulation breakdown. Check the ignition cable for hardened or cracked insulation, which can leak the spark to earth and appear as a transformer fault. Also verify that the primary voltage and secondary output are correct for the application.