Pump was working fine but the on off switch will not work.
You might not be able to replace the switch parts might not be available jacuzzi is out of business you might be able to replace the motor if not get a new pump they can cross reference for you
SOURCE: Jacuzzi magnum pool pump impeller broke
The impeller on the Magnum pump unthreads counter clockwise as do other impellers. There is a shaft of the motor that runs the length of the motor, on the back of the motor when you take the bell housing off you will see a small silver spot with a **** in it for a standard screwdriver. Put the biggest one in there you can and then grab the impeller and turn it counter clock wise and it should unthread. Sometimes they won't if it has been on there a number of years. You will need to break it off if it doesn't unthread. Then just purchase a new Impeller for the Jacuzzi Magnum Pump.
Rod
US Parts Center
SOURCE: Pump works fine, but is very loud
Its probably not a high quality pump, bearings starting to wear is likely the sound you hear.
SOURCE: Pump will not work in high speed
Clean the relay contacts on the board. Cut the power, ofcourse. Also, try switching the hot wire on the low side of the pump to the high side to rule out the pump.
SOURCE: pump stops running on high speed
You have a magnetek motor and it is overheating and cycling its thermal overload. A local electric motor repair shop may be able to fix it however it will likely need to be replaced. It is to costly to repair the motor if the damage is in the windings.
Assuming at that low a horsepower it is 115V, the likely replacement motor is a catalog #BN37. We sell it for $157. You are usually better off replacing the seal when you replace the motor and most Jacuzzi pumps are either a 200 or 1000. They should be around $5.
SOURCE: Pump hums when switched on but does not work more than 20 seconds
hi i had the same problem with my booster pump motor it hum but did not turn. to make a long story short see if there is a metal cap on the back of your motor if there is pry it off and you should get to see the shaft turn the shaft with a screwdriver if it has a notch in it or if it don't turn the shaft anyway you can and make sure it turns easy. my shaft was tight as hell but i got it to turn and it started right up again and i had no problem. the hum means it is stuck and it shuts off because the breaker is tripping and after a few seconds it will click back on again, hope this helps
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