Of course! Wait 20 seconds and switch it on again; it's the best reset you can think of.
BTW, leave it normally on 24/7, no problem, automatic head checks and only a minor zoom from the fan.
In fact, I swiched off fom the mains, and switched it back on. Problem solved.
Having discusseds of 24/7 with Neil Snape and some others, I opted for leaving
it on every night, and only when necessary during the day.