HI there Went to use my AS18-2 compresser today after having it stored under a bench, unplugged. Last time used about 8 months ago, anyway it fired up a little pressure, which when I pressed the toggle on the air bush was used up in 15 seconds and then no more, just an electic 'im switched on' type noise and getting warm to touch. No air. Anyone come across this before? It was new last Christmas so a year old.