I have a Dewalt DW340K hot air gun that has just decided to blow only warm air whatever the position of the variable temperature setting control.
For that reason I don't think the element has failed - is it most likely to be the triac?
I've ordered a triac (BTA12-600) as it's only a couple of quid. If that doesn't fix it, is it worth bothering?
There are several other components on the control board but I don't know if I can check them in circuit with just a multimeter. None look obviously "blown".