Home Improvement Questions? Ask a Handyman for Answers
Yes leave the unit off. If the system is only sending bubbles that means you dont have proper suction from the motor. Without proper suction, the pump motor wont have any water to circulate. Without water it will burn up and you will end up replacing the pump if that is not where the problem is to begin with.
Long story short, yes keep the unit off until the trouble shooting is complete.