LG Oven F5 Error — Door Switch Fault Fix Guide

What Does This Error Mean?

F5 means the door switch — the sensor that detects whether the door is open or closed — isn't reading reliably.
This affects both safety (interior light) and the self-clean lock.
Open and close the door firmly several times.
Most F5 events clear with clean activation.
If F5 persists, the switch needs replacement (100–200 USD).

Affected Models

LG LRE series electric range
LG LSE series slide-in
LG wall oven
LG ProBake convection range

Common Causes

Door switch arm bent away from the door catch
Switch contacts welded together or stuck
Wiring loose at the controller
Door alignment shifted (sagging) preventing contact
Switch worn out from years of use

How to Fix It

Open and close the door firmly.

Open the door fully.
Push it closed with firm force.
Try this 5–10 times.
The switch may just need clean activation.
Listen for any click or feel for any change as you close — that's the switch engaging.
Check the interior light.

Open the oven door slowly.
The interior light should come on.
Close the door — the light should go off.
If the light stays on or off regardless of door position, the switch is failing.
That's a clear F5 indicator.
Inspect door alignment.

Close the door and look at the gap with the body.
Should be even all around.
A sagging door means the hinge is loose or worn — the door no longer reaches the switch properly.
Tightening hinges (oven cold) sometimes fixes alignment-related F5.
Don't try to access the switch.

The door switch is inside the cabinet near the door's top hinge.
Replacement requires removing trim panels and working near high-voltage components.
Service-tech work — DIY risks damage.
Schedule LG service.

Provide model and serial numbers.
Switch replacement is 1–2 hours of labor plus a 30–60 USD part.
Total bill 150–250 USD.
Free under warranty.
Worth doing — F5 affects multiple oven functions and gets worse over time.

Frequently Asked Questions

Will F5 affect normal cooking?

On most LG ovens, normal cooking continues but with caveats: the interior light may not work, the self-clean lock won't engage, and the broiler may have safety restrictions.
It's usable but not ideal.
Schedule repair within a couple weeks rather than ignoring.

Can a sagging door be the only cause?

Yes — if the hinge has loosened over years, the door doesn't reach the switch correctly.
Tightening hinge bolts (with oven completely cold) sometimes fixes F5 without parts replacement.
Worth checking before assuming a switch failure.
If the hinge itself is worn beyond adjustment, replacement (50–100 USD) restores alignment.