20 Most Recent Sta Rite Sta - Rite 1/2hp Dura - Glas Inground Pool Pump Questions & Answers

If the motor is very hot it could be shutting off due to a thermal safety device.

Anything that makes the motor work too hard and/or heat up will trigger this.

Blockage in the water lines
Clogged pool filter
Worn motor bearings
Lack of air flow around the motor
Weak or damaged motor windings.

A defective thermal limit switch will **** off the pump when the pump is within heat and load limits.

https://www.youtube.com/watch?v=V45_D0l2s5A https://www.youtube.com/watch?v=e8RMfw4nZos https://www.troublefreepool.com/threads/max-e-therm-400-service-system-light-on.52433/

Check the control wire that might be connected to the control fuse. If that wire is open the unit will only cycle thru the board information and the sit dormant until the control is called for.

Try changing the Thermal Regulator. You could just remove the T/R as a test and replace as necessary.

replace the mechanical shaft seal. check impeller and diffuser for damage . prime pump after any repair

Sears runs a resource called Parts;sDirect, you can get parts for appliances, tools, lawn equipment,etc.
Need the model and serial #, it'll have exploded views of the different subsections. All.parts on the exploded views are numbered & correspond to a catalog page alongside the picture, with the cost
posted. I've used it repeatedly, very accurate, prices are competitive.

That unit has specific instructions for water temp operation at 60 or lower. The display also can show diagnostic info and there are indicator lights for diagnostics. Do you have any of those showing any errors? If the temp is jumping from 91 to 104 instantly and then back down to 91 instantly, this is a wiring issue or a bad thermistor. Check the wiring and use an OHM meter to check the thermistor, it should have a chart that shows a resistance at a certain temp. There is a limit switch right next to the thermistor, Make sure it is not shorting out with that.