If your Samsung electric range burner turns on and immediately goes to full heat — and stays there no matter where you turn the knob — this is not a settings issue and it will not fix itself. A burner stuck on high is a safety hazard. Food burns, pots boil over, and if the burner is left unattended it can ignite nearby materials. Do not continue cooking on that burner until the underlying fault is repaired.
This is a specific, well-documented problem on Samsung electric ranges that our technicians diagnose regularly across Chicago, Jefferson Park, Elmwood Park, and the surrounding neighborhoods. Here is what causes it and how we fix it.
Why does a Samsung burner stay on high no matter what setting you use?
The knob on a Samsung electric range controls a component called an infinite switch — a small electrical switch that regulates how much power reaches the burner element by cycling it on and off rapidly at different rates. Low heat means the switch cycles the power off most of the time. High heat means the switch keeps power on almost continuously.
When the infinite switch fails, it often fails in the fully closed (on) position — which means it sends maximum power to the burner regardless of where the knob is set. You turn the knob to Low. The switch ignores it. The burner glows red.
A second, less common cause is a stuck relay on the main control board. The relay functions like an electronic on/off switch that the control board uses to cut power to the burner when it reaches the set temperature. If the relay welds shut — which happens under prolonged heat stress — power flows to the burner continuously even when the control board is trying to shut it off.
How do you know which one has failed?
Infinite switch failure
The most reliable indicator: the burner goes to high immediately when turned on from the Off position, but if you turn the knob on, pause briefly, then adjust it, the burner sometimes responds normally — at least temporarily. Samsung community forums are full of homeowners who discovered this pattern. The reason: the switch is failing but not fully dead, so interrupting the knob movement briefly sometimes allows the switch to catch the correct position before it defaults to full power.
If the burner consistently goes to high and never responds to the knob under any circumstances, the switch has failed completely.
Control board relay failure
The distinguishing sign: the burner stays on even when the knob is fully in the Off position, or stays on after the range is turned off entirely. If you can smell the element still heating after you have switched it off, or the cooktop surface stays hot long after shutdown, a stuck relay on the control board is the likely cause rather than the infinite switch.
Is this a known Samsung range problem?
Yes. Samsung electric ranges — particularly models with dual surface elements (a smaller inner ring and a larger outer ring on the same burner) — have a documented history of infinite switch failures that cause this exact symptom. The dual element design puts more load through the switch than a single-element burner, which accelerates wear on the switch contacts over time.
Samsung's own community support pages note that if a burner glows bright red immediately on the Lo setting from a cold start, the range requires service. This is not a user error and it is not resolved by a power cycle.
What happened on a recent Portage Park service call
A homeowner in Portage Park, Chicago called us after the front right burner on their Samsung electric range started going straight to high every time it was turned on, regardless of the knob position. They had been managing by turning the burner on and off repeatedly to control the heat — a workaround that is both impractical and dangerous.
When our technician tested the burner, it went to full power immediately from the Off position and never responded to the knob setting. He removed the knob and tested the infinite switch with a multimeter. The switch showed no variation in continuity across settings — it was reading as fully closed at every position, which confirmed the switch had failed internally.
Location: Portage Park, Chicago, IL
Appliance: Samsung Electric Range
Issue: Front burner stuck on high regardless of knob setting
Diagnosis: Infinite switch failed in closed position — no continuity variation across settings
Repair: Infinite switch replaced, burner tested across all heat settings, confirmed correct operation
Technician: Slava
The repair took approximately 40 minutes. After the new switch was installed, the burner responded correctly to every knob position from Lo to Hi.
Can I keep using my Samsung range with one burner stuck on high?
No. Beyond the obvious cooking problems, a burner that cannot be controlled is a fire risk. If you need to use the range while waiting for repair, use only the burners that are functioning correctly and leave the affected burner's knob in the Off position. Do not assume the Off position is actually cutting power — if the switch has failed completely, the Off position may not stop the element from heating.
If the burner stays on after the knob is in the Off position, treat the range as unsafe to use and unplug it until the repair is completed.
How much does it cost to fix a Samsung burner stuck on high?
Infinite switch replacement on a Samsung electric range typically costs between $140 and $220 including parts and labor, depending on whether the burner is a standard single element or a dual surface element (which uses a different switch). Control board replacement, if the relay has failed rather than the switch, typically costs $250 to $400 depending on the model. We test both components on arrival to confirm which has failed before quoting the repair.
Samsung range repair in Chicago and surrounding suburbs
We service Samsung electric and gas ranges throughout Chicago, Jefferson Park, Elmwood Park, Evanston, Norridge, Oak Park, and Schiller Park. Our technicians carry Samsung infinite switches and test control board relays on every service vehicle — most Samsung burner repairs are completed in a single visit.
Call us or book online. We diagnose the issue, give you a clear estimate before any work begins, and back every repair with our 30-day labor warranty.
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