Safety first: Risk of burns. Turn OFF power or set gas control to PILOT/OFF before removing panels.

Steps to check:

1. Measure water temperature: Use a thermometer at a faucet to confirm actual water temperature. If above 140°F, adjust thermostat down and investigate control issues.
2. Inspect insulation: Remove access panels and verify that insulation is intact and properly covering the tank. Replace missing or damaged insulation.
3. Check for continuous firing: Observe whether the burner or elements run almost constantly. If so, check for hot water leaks in the home or a stuck thermostat.
4. Replace faulty thermostat: If the heater continues to overheat despite lower settings, replace the thermostat or gas control valve.
5. Improve clearance: Ensure the heater has adequate clearance from combustible materials per Reliance installation instructions.

Warning: Persistent overheating can damage the tank and create scalding hazards; address promptly.

Reliance water heater outer jacket feels excessively hot to the touch

Possible Causes