Purchase in September 2014, big worries in October ... At the reception there is a small simple assembly with a sponge which make up pad and the solder roll. It comes in addition to a specific alternative resistance. Surprise because it is a piece that I had never had the opportunity to change during 40 years soldering iron usage. Iron works normally the first time, good heater, with 10-15 h yet to use it intermittently and a very fast and abnormal temperature reached flashing LED indicator (?) A later use and everything returns in order (very spaced flashing). This is only after twenty hours of use, the famous light becomes fixed iron remains cold !! I will disassemble the iron as seems lohmmètre expected and measured resistance: it already has a cut end at fitting.! From there I go the resistance provided in addition (4 son because temperature sensor included) and I mapprête to change ... Luckily I had an old soldering iron 60w son as connected to it by large welds requires desoldering and therefore these welds again !. When reassembling everything works again but I know if I'm quiet for a long time because I just do this ...