There could be a few things preventing your jets from pumping water. If you just drained your hot tub, it is common to have an air lock in the plumbing and you must bleed the air out of the lines. Look for tiny bleed screws on the end of the pump. Open these bleed screws to allow air out. Always do this with the power off and be ready to close them quickly because water will spray out with the air. If you have a bleed screw on top of your filter, be sure to bleed air from there too. After bleeding, try turning the power on again and see if the jets work. You may have to bleed the lines several times before the jets fully function, but you should see an improvement each time. As long as you get the majority of air out of the lines and the jets start flowing again, the remainder of air will work its' way out.
If you didn't just drain your tub and you don't think you have an air lock, try the following:
1) Is the high speed pump working? If yes, skip to step 2. If no, check the voltage at the pump. If there is voltage, your pump is faulty and needs to be replaced. If there is no voltage, test back to the power source for open circuits or switches.
2) Is there good water flow out of some of the jets? If yes, skip to step 3.
If you don't have good water flow, try the following:
- Take apart the pump wet end and look for obstructions or a broken impeller.
- Make sure your filter is not clogged and is clean. If in doubt, try running your spa without the filter and see if there is an improvement.
- Check for closed or broken knife valves (gate valves).
- Make sure the water level is not too low and the floating weir on the skimmer is not stuck.
3) If you have good water flow out of some of the jets, look for jets that may be closed. Many jets can be adjusted for pressure and can be turned off at the jet. Also look for loose or worn out jet seals and check the nozzles for obstructions