I have had a hot tub for about 7 months or so. When I first bought it 80% of the jets did not work! It has been running ever since and we still use it without them. It has been too cold to diagnose it but now with it warming up I am ready to try and get them all going.
I am assuming there is a clog somewhere. I was told you can add vinegar to the cycle and it can help break down a clog. This is a pro form spa from costo and I dont have alot in it so hopefully this is an easy fix!