Donna is right, but IMO on most ships they don't do much. However, having said that, we just returned from the "Mariner of the Seas", and I'll guarantee that if you turned the thermostat down to cool, you'd better get the blanket out, because it REALLY worked. It was great!
Have a great cruise, and enjoy that cool air in the cabin.
Each room has its own. I have found they control the HVAC quite well, and on the occasion they didn't, a simple phone call to ship's maintenance quickly remedied the problem.
I like a cool room, especially for sleeping, and bring along a digital thermometer. Believe me, you can maintain your room down to 68 degrees if you want to. But like any thermostat, give it a chance to do its thing before you readjust. This may take an hour or so. Good luck. Steve
I'm Steve Cooper. I love Royal Caribbean, and recently discovered NCL and love them too. I've also cruised Princess and HAL.
NCL Pearl Alaska Glacier Bay
RCI Liberty of the Seas E. Caribbean