Richmond gas tank-type water heater produces very hot water, risk of scalding, even at low faucet settings.

Safety first: Warn occupants not to use hot water until the issue is corrected. Turn the gas control to the lowest setting or OFF.

• Lower thermostat setting: Turn the gas control knob to a lower temperature and test after several hours. If water is still excessively hot, the thermostat may be faulty.
• Check mixing valve: If a thermostatic mixing valve is installed on the outlet, verify its setting and operation. Replace if it does not regulate temperature.
• Test for cross-connection: Shut off cold supply to the heater and open a hot tap. If water still flows strongly, there may be a plumbing cross-connection that should be corrected by a plumber.
• Replace gas control: If the heater continues to overheat despite low settings, have a technician replace the gas control valve/thermostat assembly.