We have the electric thermostat you need to repair your water heater. Most water heaters above 20 gallons have two thermostats, one to sense the temperature in the top of the tank and one to sense the temperature in the bottom of the tank. The thermostats work together to allocate power efficiently to different heating elements in the tank. Both must be in working order for the water heater to heat water efficiently and to the correct temperature. We stock thermostats made to fit a number of different water heaters. Be sure to check the specifications of your water heater so you can select the correct part.