Shower Pump Motor - Considered Running Temperature ?

[electricloopy]

Would you consider a single phase Shower Pump Motor operating with a temperature high enough to burn finger tips touching the motor body, to be too high.

Shower pump stopped during shower, checked various things. Fuse ok etc. Although the motor as said by the manufacture to have thermal protection. The pump bodies each of pump were cold and hot as expected cylinder thermostat set at 60c.

Manufacture saying this is normal, as not accecpting a warranty claim. Yet there is an open circuit across the plug (fuse ok) and stator shows a reading on the ohms meter. A start/run capacitor is fitted, which is the next item I will test.

If the Capacitor is at fault etc., would this cause a motor to run hot with eventual total motor failure.

 

[freddo]

A faulty capacitor will cause the motor not to run and get hot. Was called to check just that on an organ blower today. The thermal protection should protect the motor if it is properly designed, but the protection may be one shot, once it's activated it doesn't reset, such as a thermal fuse or thermal link. Though the stator showing a reading is a good sign. There will likely be open circuit across the plug until the shower is turned on to activate the flow switch.

 

[electricloopy]

Thanks,
Asking about the capacitor as have read if applicable here, that they can cause a change in the second phase alongside the main phase cycle to distrupt its performance and overheat. ?

 

[Lucien Nunes]

Yes. Capacitor-run motors can overheat or experience winding failure as a consequence of cap failure. A cap that is out of spec but not completely open or shorted will cause loss.of torque and possible overheating of the motor. A cap that has failed completely will prevent the motor starting although it might continue running if the cap fails while it is running, and then overheat.

 

[Marvo]

It could be a bad cap. Also single phase motors are usually they're rated to do a certain number of starts per hour, they're very susceptible to overheating if they're cycled above that rating.