Hilton Inverness hotel in Denver. Checked in at 2:30pm, room was a little cooler than we wanted. Turned up the thermostat, but only cool air came out. Called the front desk and they sent a maintenance guy. He climbed up the access and "turned off the cold water" Still no heat. Guy came back and said he could bring a space heater. Denver forecast was for low 30's. Heater was noisy all night, could not regulate it. Should have changed rooms.