Spa heats very slowly or cannot reach the set temperature, especially in cold weather.

Safety: Ensure all electrical work is done with power off.

• Check cover and insulation: Inspect the RivieraPool spa cover for waterlogging, tears, or poor fit. Replace if heavy or damaged. Ensure cabinet panels are in place to retain heat.
• Verify heater wattage: Confirm that the installed RivieraPool heater matches the original specification (e.g., 3 kW). A lower-wattage replacement will heat more slowly.
• Inspect for scale: If you have hard water, scale may coat the heater element. Consider draining and descaling the system per RivieraPool guidelines.
• Circulation timing: Ensure the circulation pump is programmed to run sufficiently long filter cycles to allow heating.