greensoftub

It is the thermal trip in the back of the motor. It is a very thin piece of copper. The true way to test it is to test the amp draw while the motor is running to see if it the same as the nameplate.There is only 1 style pump that works with a softub and needs to be from a softub dealer because of the tubes wrapping around the motor to heat the water Every chance as this setup has been messed with. I presume that if the wrong pump has been installed then the load from the pump will be causing the excess amp draw, and the overheat. Do you know what a proper amp draw from a softub motor should be?

There is a filter system, but it's not specific to the heating section and the power of the jets seems high, so don't think it's that.

Repeat post, sorry

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?

So it's been on for 12 hours or so - pump runs for 15 minutes but will turn off for some time in between - maybe 45-60 minutes). Temperature hasn't risen appreciably, so clearly something is up - any ideas what to look at troubleshooting first? The relay on the temperature dial works - in that lowering it results in a click and the heating light going off, and vice versa. Even when the pump has stopped running, the heating light is still lit.

Just bought an old T300 softub for next to no money at all - the owners (who had never used it since they bought it from someone else) said that it would switch on for 15 minutes, then go 'off'. So it's outside now, just filled up - the jets came on for 15 minutes (or so), and are now off. The controls still indicate it's heating. Is there a chance that it's working and the jets just turn off anyway, but the pump runs to heat the water? Thanks.