Hi,
I have a 1996 CalSpas System 3000. We bought it usedbut it came with two brand new pumps which the previous owner bought and I installed. It also has a brand new heater and a a new Balboa circuit board on the way. I just finished building a new cabinet for it ( all treated lumber and treated plywood sheathing skinned with simulated barn board house siding) It looks great I have it installed in a deck that I built with a notch out just for the tub, Any way, Whike waiting for the board to arrive I have installed some industrial motor starters ( I work for a company that sells and services heavy duty industrial equipment ) in order to assess the functions of the pumps and the heater before I install the new board. ( the old board was diagnosed as having been subject to an over amp situation which caused it to burn up ). The issue I have a question about is.... With the pumps on and the heater isolated from the circuit my water still gets hot ( yes, I confirmed the heater had zero voltage with my multimeter even though I knew the current was cut at the switch.) The motors were hot to touch and my only speculation is that they were heating the water. Can this happen, and if the motors are hot enough to heat the water, can this possibly be good for the pumps? Although I did not have a thermometer in the water I can safely say the water was over 100 degrees. Any one have an opinion on this?

Thank you

Bill Sinclair

I had an arctic spa with similar problem.
After much difficulty, I found that the pump Relay on the circuit board was stuck in on position.
I also learned that it will in fact heat the water to over 100 degrees.
This info will come in handy this winter for if any customer has a tub with no heat, I can run the pump/pumps continuously to prevent it from freezing until the parts come in to fix it.
On your tub caldara, the relays may be soldered in which will require removing the board and soldering in a new one, or sending it in for repair. On the arctic, and probably many of the newer tubs, you simply remove two screws, pull the relay out, and plug in a new one. They only cost 10 or 20 bucks.
Sorry, I did not post this back in August, but maybe someone will read this in the future and benefit.