Why is my mspa U-NE022 Hot Tub not heating properly?
- AalexisbarnettAug 21, 2025
Your MSpa hot tub might not be heating properly due to several reasons. Ensure the temperature is set high enough. A dirty filter cartridge can also cause this, so clean or replace it. The water level must be at least at the minimum line; add water if needed. You can also try to reset the heater if the temperature protection switch tripped off. If the filter pump isn't working, refer to the section addressing that issue.