How To Change A Hot Water Tank Thermostat

Electric water heaters often have two thermostats one at the top and another at the bottom of the tank.

How to change a hot water tank thermostat. Replace the safety cover s and access panel s. You may have no hot water at all or it may allow the water to heat beyond safe temperatures. How to replace an electric water heater thermostat. It is a honeywell l641a1005 thats what it says on the outside and is wired into a fused spur.

Instead you get only cold water. You step into the shower and turn on the hot water faucet all set for a nice hot shower. Shut off the gas supply to the water heater. Restore power and allow the water heater to work for one hour before testing the hot water.

Gas water heaters use a different type of thermostat system. Connect a garden hose to the drain valve and drain the water from the hot water tank. And most tankless water heaters feature a display with a temperature readout and controls. The upper thermostat is the primary one that contains the high limit switch and the lower thermostat is used to detect the change in the temperature of the water.

I think that the thermostat on our hot water tank has gone as the water is getting scalding hot even when it is turned down low and no matter what temeperature i select on the thermostat the water temp does not change. The thermostats regulate the temperature of the. If you suspect a heating element has also gone bad see how to replace a water heater element. An electric water heater has one or two thermostats depending on the gallon size of the tank.

Turn off the water supply to the water tank by turning the valve in the line just above the tank. Open the water tank relief valve on top of the heater. You may need to repair your electric hot water heater. A faulty thermostat can cause problems for your home s hot water supply.

If the water isn t heating up the culprit could also be the thermostat. How to fix the thermostat on a hot water heater.