In the last two weeks, I noticed that my machine was not putting out the same cool air as the other two units that we own. The icon came on for water to be drained and I drained it each time with the machine once again putting out cold air (70 degrees). Then...a new situation arose...when I turn on machine, it blows cold air for about 1/2 hour, then warmer air and the reading on the thermostat is 99 degrees! Meanwhile, the icon to drain the machine has not come back on.