Originally Posted by offworlder
Sometimes it (the single button controller) repeatedly flashes with all 4 lights illuminated, at which point I have to shut it off (hold button on for approx 3 secs). Then I press the button again (hold for approx 3 secs) to turn them on, and they're fine, allowing me to select any of the modes (1/green, the least amount of heat, 2/yellow, the next level up, etc...).
These units retain the setting (one light, two lights, ...) between uses. So if all four are flashing when you turn it on, just press the button once to return to 1 light. Speaking of choosing a setting, I find the lights almost impossible to see in daylight which makes choosing a setting difficult.