Display shows ECON or EC, spa does not heat continuously and may not reach set temperature during heavy use.

Safety first: No internal electrical work is needed for mode changes.

• Check mode: On the topside control, cycle through modes (Standard, Economy, Sleep) using the Mode or Temp button combination as described in the Arctic Spas manual.
• Select Standard mode: Choose Standard or Ready mode if you want the spa to maintain set temperature at all times.
• Review filtration cycles: Ensure filtration/heating cycles are set appropriately so the spa has enough run time to reach and maintain temperature.
• Monitor performance: After changing to Standard, allow several hours and verify that the spa now reaches and holds the set temperature.