There are several signs that indicate your water heater is going out, including: Lack of hot water: If you are not getting enough hot water, it could be a sign of a faulty water heater. Strange noises: If you hear rumbling, banging, or popping noises coming from your water heater, it could indicate a problem. Leaks: A leak in your water heater can be a sign of corrosion, a damaged tank, or a failing pressure relief valve. Rust-colored water: If you notice rust-colored water coming from your hot water taps, it could mean that your water heater's tank is rusting and needs to be replaced. Age: If your water heater is over 10 years old, it may be reaching the end of its lifespan and may need to be replaced. If you are experiencing any of these signs, it is recommended to have a professional plumber inspect your water heater to diagnose the problem and suggest a solution.