Step-by-Step DIY Fix Guide
- SAFETY: H5 is a safety warning — treat the marked surface as hot even though the burner is off.
- Remove any cookware from the indicated burner zone.
- Allow the surface to cool — H5 will disappear automatically once the zone cools below approximately 140°F.
- Do not place plastic containers, dishcloths, or your hands on the surface while H5 is displayed.
If the warning comes back after restart
- If the warning returns immediately after a clean restart, the sensor or wiring path becomes more likely than a one-time glitch.
- H5 displays on a surface that is visibly cool and does not clear after 10 minutes — zone temperature sensor may have failed
What This Error Means
Error H5 on your LG oven means: H5 is a safety indicator, not an error code. It appears on the cooktop surface display to warn that a burner zone is still hot enough to cause burns, even though the burner has been turned off. The indicator clears automatically when the surface cools below a safe temperature. The range's self-diagnostic system has detected this condition.
The most frequent cause is burner turned off but glass-ceramic surface has not yet cooled — normal behavior. Work through the causes and fix steps below in order — many LG oven errors are resolved without a service call.
Error H5 is DIY-safe. No tools are required and the fix typically takes under 10 minutes. Follow all steps in sequence.
Oven temperature sensor faults are among the most common LG oven errors. The sensor is a simple probe on the back wall of the oven cavity — reconnecting a loose harness connector resolves around half of all sensor fault codes. Sensor replacement is a 15-minute DIY repair when the connector check does not resolve it.
Most Likely Cause by Symptom
The LG oven may stop, pause, or refuse to complete the cycle normally.
Likely cause: Burner turned off but glass-ceramic surface has not yet cooled — normal behavior
Check first: SAFETY: H5 is a safety warning — treat the marked surface as hot even though the burner is off.
The warning may return immediately because the appliance is detecting an internal fault.
Likely cause: Cookware left on a hot burner after cooking, keeping the surface warm for longer
Check first: Remove any cookware from the indicated burner zone.
Common Causes
- Burner turned off but glass-ceramic surface has not yet cooled — normal behavior
- Cookware left on a hot burner after cooking, keeping the surface warm for longer
What Not to Do
- Do not place items on a surface marked with H5 — the glass-ceramic surface retains enough heat to burn skin and melt plastic
Model and Display Variation Notes
Model-family notes
- LG oven display wording and code formats can vary by series.
- If your model behaves differently, check the owner manual before trying any deeper maintenance step.
Display and panel differences
- Panel wording can vary by series, so confirm the exact code pattern before buying parts.
Parts, Tools and Service Options
Manual and model check
Check your exact model and manual before ordering any LG oven parts.
This section stays model-first because exact manual and parts matching matters more than a generic replacement suggestion here.
When Not to Keep Troubleshooting
H5 displays on a surface that is visibly cool and does not clear after 10 minutes — zone temperature sensor may have failed
How to Prevent It Recurring
- Remove cookware from the cooktop immediately after cooking — leaving heavy pans on a hot surface extends the time H5 displays and can cause thermal damage to the glass ceramic over time
Related Error Codes
F1
The upper oven temperature sensor (thermistor) is reading an open circuit — its resistance is outside the valid range, meaning the oven cannot monitor temperature in the upper cavity.
F2
The upper oven temperature sensor has detected a temperature that is dangerously high, or the sensor is reading a shorted condition that makes the oven's control board believe the temperature is above a safe threshold.
Extra notes
- This page is based on LG support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-08
Based on: Based on LG support material and edited into consumer-safe guidance for the exact code family on this page.
Model coverage note: LG oven code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.