We just bought a used 97 coleman Horizan series 400 hot tub. After filling it up twice and got it running not all the jets are working...only four to be exact. We tried the priming but got no results. Also after about 15 min. the hot tub breaker trips and it shuts off....Ahhhh! Any suggestions?

i wonder if the high limit switch is the culprit for the breaker tripping. Inside the control box, if you follow the load lines, they should at some to a magnetic switch then continue onto the heater. if you disconnect these leads after the magnetic switch where they continue onto the heater and the breaker doesn't trip after the 15 minutes - it likely to be your high limit that is tripping the breaker.