It makes the A/C unit function as a whole-house dehumidifier.
Makes a big difference when there is less than adequate insulation,
and that sucker just keeps running trying to catch up with the heat.
During the night, the humidity can get down to being drier than in
the Sahara Desert, and people wake up with dry throat, dry eyes, etc.
The humidistat cuts that out.
After all, you can have a comfortable 83 degrees, or a very muggy
75 degrees. The humidity is the primary factor, in spite of thermostats
controlling most A/C units.

Can you tell that I've installed one on my unit?

HvacTech2 wrote in message
...

Did you install a humidifier? what is the purpose in installing this
humidistat? ( what are you trying to achieve?)