@Cybercarter 

Please check whether the HS100 is poor contacted, such as partially loose. And check whether the pins contacted are rusty/have Impurities adhering to the contact surface.

All above may cause the HS100 to overheat and trigger over temperature protection. 

Try to change another appliance plugged into the HS100 and verify whether it works well. 

Besides, you can hard reset the HS100 and reconfigure it to give it a go.

Still the same, please tell me the model number of the appliance and the power consumption. 

May it help.