No way to fix that - your tank is scrap.
According to DIY on Hot Water Promblems if theres not enough water then you hit the reset button. If the water is too hot then change the temperature and reset. If you have a leaky heater then you need to replace the valve. If you have a rusty tank then you need to replace the water heater. If you have a noisy heater then you need to drain and flush the tank. If you have dirty water then drain and flush the tank and do it on a regular basis.
Human nature being what it is, wait until the first sign of water that shows up in the catch pan that the heater sits on. This is definitely time to replace the tank.
Yes they can go bad but are relatively easy to replace.
It is time to replace hot water tank before it starts leaking. Try and drain tank and see if that helps. It is rust that is poping inside tank. If your tank is over 8 years old i would just replace it
Take cold inlet water pipe off tank. The dip tube sits below the fitting joining to the tank on the cold inlet side. You can pull it out and replace it.
When you de-winterize your unit, simply turn the isolation valve to allow water to flow to the unit. When you connect a water source, or fill the water tank, and turn on the water pump, the water heater tank will autimatically fll with water; however, do not turn on the water heater until there is water in the tank. They are costly to replace.
If the leak is from the tank itself and not a connection, it's time to replace it.
yes and when it breaks your water heater will leak when the steel tank rust.
Probably more, but one way to tell, is if it's leaking and it's old Human nature being what it is, wait until the first sign of water that shows up in the catch pan that the heater sits on. This is definitely time to replace the tank.
No, an expansion tank is not required.
The hot water valve should always be open, so the hot water can exit the heater into the system. If your actually meaning opening the drain valve on the bottom of theater, the water in the heater will drain, starting with the hot water stored there, and then the cold water that is entering the tank to replace it will simplt flow out the bottom before being heated. Dpending on where the heater is located will denepnd on how much of a mess the ensuing flood will be.