Nuway Elektrodyn Transformer C04003A

The Nuway C04003A is an intermittent-duty ignition transformer rated at 50 mA and 110 V, carrying the manufacturer reference P76734. It is used on OIL Spares Elektrodyn oil-fired boiler installations, where it supplies the high-voltage feed to the burner electrode assembly. The unit is a service component for the Elektrodyn burner range.

• The burner fires intermittently or fails to establish a flame, with the electrode spark weak or absent.
• Repeated lockouts on start-up that clear only after the transformer cools.
• Buzzing, arcing or a burning smell from the transformer body during a call for heat.
• Visible damage to the casing, insulation or lead terminations, including tracking or discolouration.
• Continuity or resistance readings on the windings that fall outside the values expected for the burner.

• Confirm the appliance is an OIL Spares Elektrodyn and check the burner data plate against the manufacturer's parts list.
• Compare the voltage and current rating on the existing transformer label with the 110 V, 50 mA rating of this part.
• Check the existing unit for the C04003A or P76734 marking before ordering.
• Isolate the electrical supply to the boiler and burner before removing or fitting the transformer.