# AGA Error Code U400

> AGA error code U400 — The range has been incorrectly connected (supply wiring fault). Which models show it, what causes it and how it is fixed. Mon–Sun 8:00AM–8:00PM. Call or text 206-427-7323.

- HTML page: https://aga.repair/aga-error-code-u400/
- Markdown version: https://aga.repair/aga-error-code-u400.md
- Site: Appliance Repair Pros (https://aga.repair) — 206-427-7323 — Mon–Sun 8:00AM–8:00PM

## On this page

- Meaning
- Models
- Causes
- Fix
- Related problems
- More codes
- FAQ