1. Keep the pump upright for more than 24 hours before using it to wait to the contents to settle, because it is maybe upside down or on the side during shipping.
2. Each pump is tested with water and electricity at manufacturing before the sale, so there will be little water, which doesn't represent it is used.
3. You need to confirm your water pump, and the advised water flow of our mini heat pump is 300 -750 gal/h.
(1) If the water flow is too fast, there is not enough time for the pump to heat water, causing the outer part to freeze up.
(2) If the water flow is not enough, water is not circulating up, which also results in E8 Code and it doesn‘t work.
4. When the pump works properly, there is a temperature difference between the fan outlet and the back air inlet, and also a temperature difference between the water inlet and the outlet.
5. If you want your pool's temperature to rise quickly, having a solar cover covering the pool at night is helpful.
6. It is helpful to take some photos or videos when you have any usage issues.