Electric dampen electric fire problem? I have an electric river heater, and it stopped producing hot hose...

I have an electric river heater, and it stopped producing hot hose down, only cold hose down comes out of my hot taps. Hubby presed the reset button, but it singular heats the hose for a short period of time and afterwards it's back to cold river again. What could be causing this, how can it be fixed, and is it something I or hubby can do ourselves? I be told that my heating elements (whatever those are) may inevitability to be replaced. Could that be the reason for the cold marine?
Answers:    The heating elements inside the hot river heater are what trade name the water hot. It isn't rocket science, and should be resourcefully within your proficiency to understand how the electric fire operates.
The elements are most expected coated with mud, or salt of material that the sacrificial anode inside the heating system has help to create. This is a common problem. It is vitally the same stuff that builds up within an electric iron that you use to iron your clothes, if you use the steam function of it. The best answer is to replace the elements, which is a simple job, but the hose down heater must be drained. The tremendously first thing is turn bad the power to the tank. There should be a circuit breaker freshly for that tank surrounded by the breaker box. There is, or should be, a cold water shut past its sell-by date valve for the cold hose inlet pipe. Connect a hose to the hose connection spout at the bottom of the water furnace. Run that hose outside and open the stopcock. If water does not freely flow out of the reservoir, try opening hot river faucets that are above the tank, inside the house. If that doesn't work, scrupulously, and I mean "carefully" depart the over temperature/pressure valve located at the top of the container. I say fussily because damage to that spout could render it unusable and that makes the reservoir a bomb waiting for a time to go sour. Open it by lifting up on the lever attached to it. Just a little bit to tolerate air into the cistern. It may need to be moved out open for awhile. If nearby are 2 heating elements, as soon as possible, spread out the upper one to allow air contained by to complete the tank draining. If making a liquid mess is not an issue for you, then initiate the upper element, if here is one when you being draining the reservoir, on the provision that opening a hot wet faucet doesn't do any good to take air pressure into the reservoir.
Once the tank is drained, remove the wires to the elements, remove the heat elements and take them to a store close to Lowe's and get replacements alike size and wattage as your bad ones. Reverse the removal procedure to put them into the reservoir. I realize that this appears to be a long drawn out procedure, but it really is not. It will all travel very like greased lightning once the 2 of you get into it.
yes, buy anew one