Is my Dolphin sensitive to hot or cold water?
As stated in the warranty document, the robot should be used in water temperatures 43F - 95F (6C - 35C) for optimal results.
The colder the water, the less efficient the Dolphin robot will be. Cold water can make it difficult for the robot to climb.
If the water is too warm and poorly calibrated, this can create algae that can clog the filters and affect the Dolphin's cleaning efficiency.