LG Dishwasher E1 Error Code — What It Means
The E1 code is a leak and overflow error. Water reached the base of the dishwasher and lifted the float switch, which halts the cycle to prevent flooding. The job is to find the leak, dry the base, and replace the float switch assembly if it does not reset.
Common Causes
- Internal hose leak A loose or split internal hose drips water down into the base.
- Overfilling inlet valve A valve that lets in too much water can overflow into the base pan.
- Worn door gasket A tired door seal lets wash water leak out and pool below the tub.
- Wrong detergent Hand dish soap creates foam that overflows and trips the float.
- Faulty float switch A stuck or failed float switch reads water that is not there and posts E1.
- Sump seal leak A worn sump seal drips into the base pan during the wash.
Step-by-Step Fix
- Turn the dishwasher off and close the water supply at the sink
- Open the unit and place a level on the bottom to confirm it sits flat
- Pour about a gallon of water in the tub and watch where it pools to spot the leak path
- Dry the base pan with a towel and a low-heat hair dryer, then leave it unplugged a few hours
- Check the door gasket, internal hoses, and inlet valve for the leak source and fix it
- Test the float switch for continuity and replace the assembly if the readings are wrong
- Restore power and water, run a cycle, and confirm E1 stays clear
Parts Often Needed
| Part | Notes |
|---|---|
| LG dishwasher float switch assembly | Amazon | Match the float switch to your full model number. |
| LG dishwasher door gasket | Amazon | Replace if the seal is worn and letting water out. |
| LG dishwasher water inlet valve | Amazon | Swap if the valve overfills and pushes water into the base. |
When to Call a Pro
If the base is dry, the unit is level, and the float switch tests good but E1 keeps returning, a slow leak at the sump or pump seal is likely. A technician can locate the seeping seal and confirm the repair before water damages your floor.