⚠
warning Rheem
Error Code E3
Leak Detection Alert.
? What Causes This
LeakSense™ system detected a water leak.
✓ How to Fix It
Inspect for leaks as described in the troubleshooting section. If a leak is confirmed, shut off the water supply and contact a licensed plumber.
Source: page 1 of the official manual
From the manual
This error code appears in:
Rheem Gladiator Water Heater