HvacTech2 wrote:

a humidistat is for humidifiing only...

Herbach and Rademan (800) 848-8001 http://www.herbach.com sell a nice
$4.95 Navy surplus humidistat, their item number TM89HVC5203, with a
20-80% range, a 3-6% differential, and a 7.5A 125V switch that can be
wired to open _or close_ on humidity rise...

if you have the proper equipment it can slow the fan down to dehumidify
the air more during cooling.

Sounds like a job for a dirty filter.

Nick