i bought a Whirpool when i'm using it it shut down after about 20 minutes i let it cool down then restart it run again, the other day my cousin use it until there was smoke comming from it, my home current is 110volt 50Mhz but the power on the pum read 120volts 60Mhz will that make a difference to cause the pump to over heat, i call american standard they said The motors are equipped with a heat sensor so if they get too hot they will turn themselves off, is there a transformer/converter to convert my power source from 110 50Mhz to 120 60Mhz