This was a fairly awful stay for me. I had booked 3 nights in an air-conditioned room, however the air conditioning did not function, and the temperature outside reached 38°. When I arrived on Friday the windows to the room were open, which was certainly a bad sign, but I thought perhaps someone was just trying to air it out. I set the thermostat to cool, and went out to enjoy the city. When I returned after midnight the room was not cool at all, but was quite warm, which interfered with my sleep.
I went to the front desk at 7:00 and told the receptionist, who said she was unable to do anything, please return at 9:00, the hotel had 30 rooms with air conditioning and mine was one of those rooms, there were no other rooms available because the hotel was fully booked. I had planned to be having brunch and sight-seeing before 9:00, but waited until 9:00 and went back to the desk. A technician accompanied me to my room, fiddled with the thermostat for a while and pronounced the air conditioning on, even though the air coming out of the register was not noticeably cool. I went out to spend the day in the city. When I returned the room was warm. I slept fitfully, spent Sunday in Amsterdam, and left the hotel Sunday afternoon although I had already paid for the room for Sunday night.