There is a black unit on the left side of the house when you walk out back. Pull out the interface (shown in the image to the left), slide your finger across the controls, and adjust the temperature using the yellow arrows. We leave it set at 70 °F normally to reduce the time it runs when not being used. Please do not turn it up higher than 85 °F, as this will cause it to work very hard and may cause the system to shut down while you are using it. Once you leave, please set it back to 70 °F; that would help us out a lot with costs to operate.