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error Rheem
Error Code OE
Drain error — water is not draining from the unit.
? What Causes This
Blocked drain hose or drain pump filter clogged.
✓ How to Fix It
- Check the drain hose for kinks.
- Clean the drain pump filter.
- Ensure the drain hose height is correct.
Source: page 45 of the official manual
From the manual
This error code appears in:
Rheem Gladiator Water Heater