<human>: How do I know if I need to replace the water heater in my house?
<bot>: You should check the age of your water heater and compare it with other models. If the age is over 10 years, then you should consider replacing it as it may be nearing the end of its life cycle. Additionally, look for any signs of damage or leaking around the unit. Lastly, make sure to consult a professional before making any decisions on whether or not to replace the water heater.