What 3E / Hr / 2E / AE (402-prefix) Means
The electronic faults on the 402-prefix Kenmore front-loader: 3E for no signal from the drive motor tachometer, Hr for a failed heater relay on the main board, 2E for an internal control board failure, and AE for the main and display boards losing contact.
Common Causes of 3E / Hr / 2E / AE (402-prefix)
- A tachometer on the drive motor no longer reporting
- A heater relay failed on the main board
- A communication fault between main and display control boards
🔧 One Safe Check You Can Try
Unplug the machine for five minutes and restore power; the published route for 2E and Hr begins with exactly that, and a code that returns has answered the question.
⚠ Why You Shouldn't Go Further Than That
- All four faults live on circuits carrying mains voltage inside the cabinet of a wet appliance.
- The heater relay is a component of the main board here, so a relay fault means a board in practice.
- Guessing between main board and display board doubles the cost when the guess is wrong.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.