Why is my Bestway LAY-Z-SPA S100101 pump not heating properly?
- KKatherine FullerAug 5, 2025
Several factors can cause this. First, the temperature might be set too low, so set the spa to a higher temperature. A dirty filter cartridge can also be the culprit; clean or replace it. If the thermal cut-out has tripped, unplug the pump and let it cool until the water temperature reaches 35°C (95°F) or lower before restarting. Also, ensure the spa is covered to retain heat.