prv
Well-Known Member
One had the (irreplaceable) catalyst go.
Irreplaceable? If I remember rightly, the catalyst is part of the soldering tip (or hot-air tip or knife tip) and hence unscrews. In fact, with the Maplin ones, if you buy the pack of extra tips to get the hot-knife and hot-air (for heatshrink), you get a spare soldering tip, complete with catalyst, along with them.
Pete