Not always though. They say they don't break down in the shed. I guess that not true anymore here either. I had a fan belt/serpentine belt that also runs the alternator on my sprayer break  this year upon startup in the shed.  The A-post said low voltage. Upon investigating saw the broken belt.

    No over heating of engine and was able to drive right to the shop. Didn't even have to call for a ride or anything.  But I did make the comment that was the most convenient breakdown ever had.