Decided to final replace my extremely old 1970's thermostat with a new programable one. I turned the power off at the circuit breaker and turned off the larger circuit breaker next to the unit outside. The A/C doesn't turn on but when I turn the fan on from the auto position the fan comes on? Is this normal which means I'll need to turn the whole house power off or is it safe to move forward with the swap out? Thanks,

There are times throughout the night that I feel clammy even though the temp is low enough. So basically i'm wondering what the best way to maximize the dehumidifying ability of the ac? The room is small (~125 sq ft) and doesn't get much sun. I bought the smallest possible BTU unit , 5000 BTU, in hopes that the compressor would running often to remove the most humidity possible. Its a model that slings the collected water onto the condenser coils to improve efficacy. I drilled 3 small holes in the plastic bottom to allow the water to drain just incase some of that water was getting back into the room somehow. i used some sheet metal to divert the cold air upwards in hopes that it would leave the compressor on longer. Maybe its the best I'll get but at night when I go to sleep its 72 and in the low 50's % humidity which is nice. But other times I'll wake up and feel clammy and the temp will be the same or lower and the humidity is 65%. I almost feel like 5000 BTU is too much for this small room as the compressor does not stay on for long periods of time. Also this is a cheap unit that the fan runs constantly. When the compressor turns off could the fan be blowing that much humidity back into the air from the evaporating coils? Any idea on how to get the humidity into the mid 40's? I feel so much more comfortable when its around that.