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

Safety: No internal electrical work is required for basic checks.

• Check cover condition: Inspect the QCA Spas cover for waterlogging, tears, or poor seals. Replace if heavy or damaged.
• Reduce heat loss: Use a floating thermal blanket and ensure the equipment bay door is closed and insulated.
• Verify circulation: Confirm that the circulation or low-speed pump runs during heating. If it cycles off prematurely, investigate pump or control issues.
• Adjust filtration/heating schedule: Keep the spa in Standard mode during very cold weather so it can heat whenever needed.