Hi, this sounds like a Balboa pack and topside control. press the temperature button along with the light button. This should put you into the filtration mode selection. Then toggle using the temperature control buttons until you find your mode ST for standard and EC for Economy or SL for sleep. You can find more information here. How to change the Filter Mode on Dream Maker Spa
SOURCE: Cannot get temperature buttons on hot tub to change
Hi,
Do the other buttons work? Is the control panel locked, some spas have a control panel lock to prevent kids from playing with the temperature. Are any of the buttons stuck in the de-pressed/down position? If neither the problem is likely in your topside control which means it will need to be replaced.
If the SLP or SL Message is Alternating with the Water Temperature on the Display, the Spa is Operating in the Sleep Heating Mode.
If the SLP or SL Message is ON Solid (Not Flashing) on the Display, the Spa is Operating in the Sleep Heating Mode, but there is No current water temperature because the Spa is between Filter Cycles.
Hope this helps.
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what is the meaning "sl" mode? Sleep?
also make, model, above? below ground?
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