Vita spas use an internal heater to keep the water temperature controlled according to the user's programmed settings. If the heater is not keeping the water temperature warm, or if it is overheating the water, diagnose the spa to determine the cause of the problem. By following the troubleshooting procedure, you can determine possible causes of the issue.
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Check the circuit breaker panel or fuse box. Replace any blown fuses, and reset any tripped circuits.
Inspect the spa filter. Clean the filter if it is clogged or dirty. A dirty filter could cause lack of water flow, which may disable the heater.
Look for a lock icon on the display. If the panel is locked, the heater cannot be adjusted. Press and hold the up arrow for five seconds to unlock the control panel.
Check the display for a high temperature sensor indicator. If the display reads, "HILI," the high temperature sensor detected that the water temperature is above 44.4 degrees Celsius. If the temperature reaches 46.1 degrees C, the spa is disabled and you'll need to reset it. Press and hold the "PROG" button for five seconds to reset the system once the water has cooled to 40 degrees C or lower.
Switch out of Economy mode if it is enabled. Economy mode keeps the spa from turning on the heater outside of programmed hours. Press and hold the "PROG" button for five seconds to enter programming mode. Press the up or down arrow to change between "ECO" for Economy Mode and "AH" for Auto Heat. In Auto Heat mode, the heater turns on whenever it needs to heat up the water to maintain the programmed temperature.
Leave the cover on the spa when heating the water. Covering the spa will prevent heat from escaping, allowing the water temperature to rise more quickly.
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