The digital temperature-controlled soldering iron on the electronics bench seems to have given up the ghost. The tip doesn’t get hot and the screen just displays “5-E” as the “real” temperature no matter what value you select for “set”. Presumably 5-E is an error code.
I believe this is the second of two of this model that we have had which has gone wrong? We should really try and get a set of reliable irons as a matter of urgency, as it seems that we are currently unable to do any soldering, which the whole activity of electronics really hinges on.