I have an LG dishwasher showing OE error code, and I noticed something strange. When I disconnect the drain hose and place it low in a bucket, water drains fine. But the moment I lift the hose to its normal height, the water stops draining. I even had a technician say the hose might be clogged, but I’m not fully convinced.
If this sounds like your issue, here’s what’s really going on and how to fix it.
Quick Answer
If your dishwasher drains only when the hose is low, the issue is usually a partial clog or restriction in the drain system. The pump can push water out at low height, but fails against normal gravity resistance, triggering the OE error.
Step-by-Step Fix Guide
Step 1: Understand the symptom
This is a key clue:
- Drains when hose is low → Pump is working
- Stops when raised → There’s resistance or blockage
This means the problem is not the pump, but the drain path.
Step 2: Check for a partial clog in the drain hose
A clog doesn’t always block completely.
- Food debris, grease, or rice can build up
- This creates a “choke point” inside the hose
When pressure increases (hose raised), water cannot pass.
Step 3: Blow air back through the hose (proven fix)
One of the most effective fixes is to clear the hose using compressed air:
- Disconnect the hose from the sink drain
- Use a compressor or air pump
- Blow air back toward the dishwasher
- Wait for a gurgling sound, then test again
This method has been confirmed to work in real cases.
Step 4: Inspect the drain connection under the sink
Sometimes the blockage is not in the dishwasher:
- Check the garbage disposal inlet
- Look for buildup where the hose connects
- Remove any debris
Step 5: Check internal dishwasher drain path
Inside the dishwasher:
- Clean the filter
- Inspect for food particles or debris
- Check internal drain channels
Even small objects like seeds can block flow.
Step 6: Check for choke points or siphon parts
Some LG dishwashers have internal fittings that can clog:
- Look for plastic connectors or traps
- Remove and clean them if possible
Step 7: Only consider pump replacement last
Since water flows when the hose is low:
- The pump is likely fine
- Replacing it too early is a common mistake
Extra Tips and Best Practices
- Rinse off heavy food before loading dishes
- Avoid letting rice or small particles enter the system
- Clean the filter weekly
- Run hot water before starting a cycle
Common Mistakes to Avoid
- Replacing the pump without checking the hose
- Assuming a full blockage instead of partial restriction
- Ignoring the sink drain connection
- Not testing with the hose at different heights
FAQs
Why does my dishwasher show OE error?
OE means drain issue, usually caused by a clog or slow drainage.
Can a partially clogged hose still drain?
Yes. It may drain when pressure is low but fail under normal conditions.
Is my technician right about the clog?
Most likely yes. Your test confirms a flow restriction, even if it’s not fully blocked.
Conclusion
If your LG dishwasher drains only when the hose is low, you’re dealing with a partial blockage in the drain system. The pump works, but it cannot overcome resistance when the hose is raised. Clearing the hose, especially using compressed air, is often the fastest and cheapest fix.
