Only one jet works on my garden jacuzzi tub. What could cause the remaining 3 not to work?

SOURCE: Only 3 of 6 jets in jacuzzi tub working

Make sure the jets themselves are fully opened. Some models you can turn individual jets on & off

SOURCE: jacuzzi tub makes noise but jets wont work

sounds like maybe the impeller is just spinning on the shaft of the motor.

SOURCE: some jets dont work

jets don't 'clog' - turn the face of the jet nozzle - it is perhaps an adjustable jet you have that has been turned off.

SOURCE: jacuzzi whirlpool hot tub, flashes Fl-1 has new filters,

Sounds like a bad heating element. This is located in a stainless steel tube under or around the main control box behind the cover around the tub. It is not hard to replace but should be done by a pro. The part is avaliable online.

SOURCE: my bathtub jacuzzi wont work. I reset the circuit

make sure you have power to outlet that motor is plugged into,if so try pushing jet button in tub about ten times in a row quickly then on tenth push use as much force as possible and hold.if this does not work,air hose from back of button to pump motor may be disconnected.