Display shows SLP or SLEEP; the spa temperature drops between cycles and does not stay at the set point.

Note: SLP is a mode indicator, not a hardware failure.

• Change operating mode: Use the topside control to switch from Sleep to Standard or Economy mode, according to the Lifesmart manual.
• Adjust set temperature: Confirm that the set temperature is higher than the current water temperature.
• Review schedule: If your model supports scheduling, ensure the heating/filtration windows are set to your usage times.
• Reset control: If the mode cannot be changed, power cycle the spa and reprogram the settings.