hot to the touch
Customer was slow in adding capacity to the server room so the new multi-million dollar system was placed in a temporary room which was cooled by portable air con units (their idea)
Came in on Saturday morning to do some work, touched the door handle and burnt my hand.
The portable aircon had failed for some reason (circuit overload?) but amazingly after shutting the system down and letting it cool naturally for a few hours, it all sprung into life.
Did diags on everything (even the drives) and it all checked out.