Should Honeywell W8150A1001 switch be set to “On” or “Override”?
Below is the text from the user manual. Hope it is helpful. I have the same unit in Florida, also high humidity.

On (optimal ventilation) – W8150 ventilates, based on control settings.
Override – W8150 runs ventilation continuously.
Off (Remote Only) – W8150 supplies ventilation only when there is aremote call.

If the ON position is causing the blower to run continuously (mine does not), then recommend to set your unit to OFF, unless you always want fresh and humid air which is what OVERRIDE is giving you.