De Dietrich Oven Er3 Error Code — Meaning & Causes (2026)
Oven door locked/blocked as a safety response linked to an active Er1 fault. Below: what triggers it and what to check — this code carries no single repair to price. Reviewed July 2026.
What Er3 means
Oven door locked/blocked as a safety response linked to an active Er1 fault.
Likely causes, most common first
- Triggered by an active Er1 temperature-probe fault
- Door-lock mechanism fault
Base: 1 published national repair-cost guide (retrieved 2026-07) · full source registry on the methodology page · Code meaning & causes · Reviewed July 2026
No single repair to price for this code
Er3 doesn't point at one failed component, so we don't attach a price module — forcing a repair mapping here would be dishonest. If the code keeps returning, the underlying symptom (not the code) is what gets priced: browse the wall oven repair costs for the problem you're actually seeing.
Codes are universal — your location changes the repair price, never the code's meaning. See the methodology for the exact localization formula and sources.
Reviewed by a Red-Seal certified appliance technician.