Of course not - I had a Kingfisher at my last house (1992-2006) with gravity HW and pumped heating, which I quickly converted to C Plan.
I've just cottoned on: SE = Standard Efficiency, as compared to HE (High Efficiency -i.e condensing). I thought it was part of the Kingfisher model name.
make sure the thermostat phial is pushed in all the way,
follow the little copper wire from the thermostat dial and it should go into a little pocket on the heat exchanger secured with a split pin.
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