My hot water heater at my cottage started just making luke warm water one day on any setting. I replaced the thermostat thinking that was the problem, but it was not.
I was under the place and found the thing is leaking like a sieve. I think it may be leaking at the element. First, will this cause it to not make hotter water? Second, Will replacing the element correct this, assuming that is where the leak is?
(1) If the water leak is from the seal behind the element then a new gasket will probably fix the problem. (2) If the leak is comming from somewhere else then perhaps you should look to replacing the water cylinder completely as it has probably past it’s best. (3) If the hot water is continually leaking out of the cylinder with sufficient flow then the electric heating element will struggle to heat up sufficient water to give you hot water at the temperature you require.