Particles

• Jacuzzis may not be used often and, unlike spas, they are rarely set up to cycle from day to day to help purify the water. When they are only used once every few months, users may discover black flecks floating in the water. These flecks are from the tubes and pipes of the Jacuzzi system. They may be leftover from installation and have not fully washed out yet or they may be collected sediment from underused pipes.
  
  

Primed Pumps

• The Jacuzzi pump must be properly primed in order to send water through the jets. Sometimes if the spa is emptied and then refilled, the pump is no longer able to operate the jets. Users can often solve this problem by turning the jets on and off several times, then releasing any trapped air through the diverter valve in order to build up pressure again.
  
  

Poor Jets

• If the jets work but they only produce slow streams of water, then they could be partially closed or jammed. If they are open, users should check the Jacuzzi filter. A dirty filter can slow down water so much that the jets stop working properly. If the filter is clean, then poor jet action is probably due to a problem with the pumps themselves.
  
  

Heat

• Sometimes Jacuzzis can become too hot, and sometimes they can fail to heat up at all. This is usually because of thermostat problems. Lowering temperature settings or replacing the thermostat may solve overheating. Too little heat may mean the Jacuzzi is in economy mode or that the heat is escaping into the air too quickly.
  
  

Lifespan

• The lifespan of the average Jacuzzi is about 10 years at the most. When the spa grows older, it tends to start failing more frequently, developing problems with jets and its motor. You can replace various components, but buying a new Jacuzzi may be more economical in the long run.