I'm getting pretty short cycles with the A/C running. It usually only runs for 8-15 minutes depending on the temperature (85F-100F) outside. I have the thermostat set to 78F and it turns the A/C on at 79F and off at 78F. Are there any thermostats that allow me to set my own activation and deactivation temperatures? It would be nice to have the A/C turn on at 79F and off at 76F or 77F.