We are an electrical contractor. A client asked

There arn't any provisions for ejecting water out of the pumps that i know of. The pipes are installed on the tub so that they will gravity drain back into tub. The pump wouldn't be able to run unless fully submersed in water above the jets, i mean it will but not for long. I would sugest disconnecting elec. to pump until you resolve the issue or else the pump will burn.
-This sounds like some kind of air switch problem. Something is causing the air switch to sense the air pressure excerted through the air hose without the button being pushed. This is the only thing it really could be since the power to the pump goes through this switch. I cant imagine anything else causing this other than a faulty air switch on the pump itself. This would mean the pump would need to be replaced since the air switch is sealed in place at factory. Unless some how, some way, air pressure is increasing in the air hose all by itself, not likely. But check the air hose connections on the pump and the button on the tub, if you can even see it. The hose may be partially attached and any slight movement while partially attached could push air into the switch but thats kind of a long shot. I dont know if a craked or split air hose could cause this to happen but i guess its possible.
-If i had to bet on it i would definatly say the pump switch is defective.
Good luck!.............T.Wood CFE Plumbing