What is the function of a Honeywell oil furnace transformer?

In oil fired heating equipment, an ignition transformer provides a high voltage output to create a reliable spark across burner electrodes, igniting the oil air mixture. Honeywell branded ignition units are typically used in residential or commercial burners as part of the safety and ignition train. The transformer must match the burner’s required secondary voltage and current rating, duty cycle, and wiring configuration, and it is checked during service when ignition is weak or intermittent.