My question is why the water heater overflows with water. I need a reference if it may not be the model or the brand because it is from my mother-in-law and I live far away but she wrote to me wondering and I want to see if I can help her in any way. Beforehand thank you, Best regarts

Difficult friend is to be able to help you if there is not at least a photo of the water loss it can become the safety valve as well as a loose or corroded connection if you can add some information of the matter