If your electric shower head has stopped working properly, you may be able to diagnose and fix the problem yourself. Electric shower heads provide instant, nearly unlimited hot water to your shower by heating the water as you need it, as opposed to conventional hot water tanks that work by heating up a limited hot water reservoir. If the thermostat on your electric shower head stops working properly, however, you may be in for a very uncomfortable bathing experience. By following the steps below, you should be able to diagnose and fix the problem in no time.
Turn off the Electricity - Since this is a project that requires you to work around electrical wiring, the first safety precaution that must be taken will be to turn off the power in the project area. Making this project even more dangerous is the fact that you will be working not only around electricity, but also water. Since the combination of water and electricity has the potential to be fatal, be sure that all electricity is turned off before continuing. If you are unsure of proper procedures for working around electrical wiring, or if you would rather not deal with this portion of the project, don’t hesitate to contact an electrician.
Test Thermostat - With your multimeter set to RX1, touch one probe to the white wire and the other probe to the small screw you just turned. The multimeter should read zero, and if it doesn't it means that your thermostat is broken and will need to be replaced.