We know well how your situation is now since your electric hot water heater or your gas hot water heater leaking, or when your tankless water heater or your 40-gallon gas water heater does/ 50-gallon water heater not heat the water functionally, which forces you to take your shower cold! But we know well that the condition becomes harder when the water that is coming from the heater is too hot than normal, causing issues for your kids.