Hot water systems are essential for modern comfort but when things go wrong, knowing how to perform Hot Water System Fault Finding can save time, money, and stress. Whether your system is electric, gas, tankless, or traditional, a structured approach to troubleshooting is key. Start by checking power and settings. For electric units, inspect the circuit breaker and reset if necessary; gas systems require a functioning pilot light and thermocouple. Confirm thermostats are set appropriately around 120 °F (50 °C) is both safe and efficient.