Waiting stage lasts for at least 10 minutes. If hint message'' does not appear on the panel within 2 minutes, and the water temperature is 1? And the panel blinks and display the setting temperature. 15kw swimming pool heater spa electric water heater constant temperature hot tub this item is in the category home & garden\yard, garden & outdoor living\pools & spas\pool equipment & parts\pool heaters & solar panels.