I received a Sunbeam EM5600 espresso machine for Christmas. It is making a noise which is worrying me.From the get go it has made a soft click periodically (it keeps the machine warm for 25 hours after making a coffee, I think the click is a solenoid or something cycling the heating element, seems to be on for about 5 seconds every 8 minutes). I don't mind this too much (though I'd sooner it didn't bother, I'm not running a cafe, speed isn't that essential!). However a couple of weeks ago it started making a second clicking noise, much, much louder, and more and more frequently, now a few times between each of the quiet clicks, though this varies. The loud clicks are not associated with the heating going on or off, according to a small electricity meter, only the quiet ones are. The loud clicks are loud enough enough to hear when trying to get to sleep two rooms away, whereas the soft ones you only notice in a very quiet room or if you are right next to the machine.I'm just a bit concerned that this could be a serious problem in the making – does anyone else have a similar behaviour?