Difference Between Cool and Cool Dry Setting On Coleman-Mach Thermostat

Updated 06/23/2026 | Published 06/14/2026

Question:

Hello, what is the cool dry setting compared to the cool setting? Thanks

asked by: Tony

Expert Reply:

Hey Tony! The Cool setting on then # CM76RR is the standard air conditioning mode and is designed to cool the trailer to your selected temperature. The Cool Dry setting is for removing humidity from the air while providing some cooling. This mode works well when the RV feels damp or muggy.

Did you end up replacing your old Coleman AC?

expert reply by: Robin H

Coleman-Mach Thermostat
(click to enlarge)

Tony

6/15/2026

I did not. Does the AC operate different in this setting?

Robin H.

6/23/2026

@Tony yes. In Cool Dry mode, the AC cycles differently than standard Cool mode to focus on reducing humidity, so you may notice it doesn't cool as aggressively as it does in normal Cool mode.