I have an older Softub that has generally been futzed with, so who knows what controller/pump etc.
The motor is overheating in that it will run (from cold water start) for 15 minutes, then cut out until the motor has cooled, then run for some more time, then cut out. Rinse repeat.
During this time, the circuit board still wants the pump to run (it's delivering 110v to the pump, and the heating light is on).
The exchanger seems to run freely enough, and the water pressure going into the exchanger seems pretty high - especially considering the water is still in the 50s, and no where near 100.
So I'm guessing that the thermal trip in the motor is going - but why? Could a failure mode of the pump be excess heat (it sounds fine, no bearing noise), could the thermal trip be malfunctioning and tripping the pump early? Could the electrics be degraded and cause excess heat?
