Have a question, any help would be great.
2000 landmark hotsprings run all the time since purchase. last year circulator pump began hanging up but could be freed up by tapping with srcew driver also noticed reduction in ozone bubbles. now tub power light red is on and ready light green flashes. tub was getting up to temp then days later green flashing light. I pulled circulator pump out and tried with 120v , pump was slow to start and noisey when running, could this be the problem??

Most likely your thoughts are correct...especially if the circ pump is original. I would replace it, if you are in a cold climate and it goes in the winter you are in trouble.

If the problem continues it may be the control thermistor or possibly the hi-limit thermistor.

Thanks dan, I just ordered the circulator pump.