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Sara HendersonAug 17, 2025
Why is my GRE swim & fun HPGIC30 Heat Pump working but the water temperature not increasing?
- MMark BartlettAug 18, 2025
If your GRE Heat Pump is working but the water temperature isn't increasing, several factors could be at play. First, ensure the operating mode is set to 'BOOST' and manually set the filtration to 24/24 until the temperature rises. Check that the automatic filling valve isn't stuck in the open position, as this can continuously introduce cold water. Consider installing a heat-insulated cover to minimize heat loss. A dirty evaporator can also hinder performance, so clean it. Finally, verify that the heat pump is appropriately sized for your pool and its environment.








