mypros+
Error code reference

LG Range Error Code HS

Hot Surface indicator

LG codesLG range codes

Hot Surface indicator — surface has not yet cooled to approximately 150°F (66°C) after element is turned off or during self clean cycle.

First step from the service manual

Wait for the surface to cool. The indicator will turn off automatically when the surface cools to approximately 150°F (66°C) or when the self clean cycle ends.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for HS.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What HS means on a LG range

The HS indicator on an LG range is a hot surface warning, not a fault code requiring repair. It activates automatically when a glass-ceramic cooktop surface or surrounding area remains above approximately 150°F (66°C) after the cooking element has been turned off, or while a self-clean cycle is in progress. The indicator is driven by a residual heat sensor integrated into the cooktop system that continuously monitors surface temperature and communicates that status to the control board.

This is a safety feature designed to prevent burns from contact with a surface that appears visually cool but retains significant heat. Smooth-top radiant elements and induction zones can stay hot well after cooking ends, sometimes for 20 to 40 minutes depending on the heat level used and ambient conditions. During a self-clean cycle, oven cavity temperatures reach extreme levels, and radiant heat transfer can keep cooktop surfaces elevated for the entire duration of the cycle plus a cool-down period afterward.

No diagnostic or repair action is required when the HS indicator appears under normal circumstances. The display will clear automatically once the surface cools to the threshold of approximately 150°F (66°C), or once the self-clean cycle completes and the unit cools sufficiently. If the HS indicator persists for an unusually extended period with no heat source active and the range at room temperature, that could indicate a faulty temperature sensor or control board issue worth investigating further.

Source: manufacturer service documentation.

Common causes of HS

  1. 01

    Normal post-cooking residual heat

    Wiring / connection

    Glass-ceramic and radiant cooktop surfaces retain heat for a significant period after the element is turned off. This is the most common and expected reason for the HS indicator to appear.

  2. 02

    Active or recently completed self-clean cycle

    Wiring / connection

    During and immediately after a self-clean cycle, the cooktop surface temperature rises well above the 150°F threshold due to extreme oven cavity heat. The indicator will remain on until the range cools completely.

  3. 03

    High-heat cooking session

    Wiring / connection

    Extended cooking at maximum power settings causes greater heat retention in the glass surface, meaning the HS indicator may stay on longer than usual before clearing automatically.

  4. 04

    Warm ambient environment

    Wiring / connection

    High kitchen temperatures or poor ventilation around the range can slow surface cooling, causing the HS indicator to persist longer than it would under normal room-temperature conditions.

  5. 05

    Faulty residual heat sensor or control board

    Part replacement

    If the HS indicator remains on for an extended period with no recent heat use and the range is at room temperature, the temperature sensor or control board may be malfunctioning and should be inspected by a technician.

See the test procedure for each cause

Frequently asked questions about HS

What does HS mean on a LG range?
HS stands for Hot Surface, and it is a safety indicator that tells you the cooktop surface is still above approximately 150°F (66°C). It appears after a cooking element is turned off or during and after a self-clean cycle. The display will turn off automatically once the surface cools to that threshold. No repair or reset is needed under normal conditions.
How do I fix the HS indicator on my LG range?
In most cases, no fix is required. Simply wait for the cooktop surface to cool down to approximately 150°F (66°C) and the indicator will turn off on its own. If you ran a self-clean cycle, allow additional time for the range to cool completely. Only if the indicator stays on with a cold range and no recent heat use should you suspect a component issue.
Is it safe to use my LG range when HS is displayed?
The HS indicator is a warning that the surface is still hot enough to cause burns on contact. You should avoid touching the cooktop surface while HS is displayed. The range itself is not in a fault condition, but exercise caution and keep children away from the surface until the indicator clears.
Will resetting my LG range clear the HS indicator?
Resetting the range by cutting power will not clear the HS indicator because it is based on actual surface temperature, not a stored fault code. The indicator is controlled by a temperature sensor and will only turn off when the surface physically cools to approximately 150°F (66°C). Unplugging and replugging the range will not speed up that process.
How much does it cost to repair an LG range that shows HS constantly?
If the HS indicator is appearing normally after cooking or a self-clean cycle, there is no repair needed and no cost involved. If the indicator is stuck on with a cold range, the issue could involve a faulty temperature sensor or control board, with repair costs typically ranging from $150 to $400 depending on the specific component and labor rates in your area.

Related LG range codes

All LG range codes
View all 39 LG range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass