Name: Dara Appliance Repair LLC
Address: 2115 West Farwell, Chicago, IL, 60645
Telephone: (773) 377-4212
Rating: 4.9

Oven Overheating? Here's Exactly How We Diagnosed and Fixed One in Chicago

A step-by-step look at a real oven repair, from a runaway heating element to safe, controlled temperature

An oven that keeps heating well past the set temperature isn’t just an inconvenience, it’s a genuine safety concern, and it usually points to something failing in the temperature control chain rather than the heating element itself. In this case, the sensor reporting temperature was working fine, the problem was further down the line. Here is the exact diagnostic process our certified technicians used to find and fix the real cause, and confirm the oven was safe to use again.

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Case Snapshot

Symptom

Oven continuing to heat well past the set temperature, occasional burning smell, food scorching faster than expected

Appliance

Electric range with built-in oven

Location

Chicago

Diagnosis

Control board relay stuck closed, keeping the bake element powered continuously regardless of sensor readings

Time to repair

Same visit

Outcome

Oven cycling on and off normally, holding accurate temperature

Safety note: If you notice a persistent burning smell, smoke, or food scorching well ahead of schedule, stop using the oven, turn it off and unplug it if you can do so safely, and don't leave it running unattended while you arrange for a repair.

The Problem

An Oven That Wouldn't Stop Heating

The oven had been running noticeably hotter than the set temperature, to the point where food was scorching well before recipes called for it and a faint burning smell was noticeable during longer bakes. The homeowner had stopped using the oven out of concern before calling for service. Overheating can come from a few different places (a temperature sensor reading incorrectly, a control board relay failing to cut power to the element, a stuck mechanical thermostat, or a wiring fault keeping the element energized) so confirming exactly which part of the control chain is failing matters more than assuming the sensor is always at fault.

The Diagnostic Process

Five Checks, In Order

Our certified technicians follow the same sequence on every overheating call, because the sensor is often blamed first when the actual failure is further down the control chain.

Test the temperature sensor's accuracy independently

The sensor's resistance reading was checked against manufacturer specification at a known temperature.

Reading accurately, ruled out as the cause

Monitor the bake element's power state throughout a full cycle

A properly functioning oven cycles the element on and off to maintain set temperature.

Staying powered continuously, never cycling off

Test the control board's relay responsible for switching power to the element

Since the sensor was accurate but the element wasn't cycling, the relay itself was tested directly.

Stuck in the closed position, continuously supplying power

Confirm the board was sending a correct signal to open the relay

Checked to rule out a signal processing issue elsewhere on the board.

Correct signal sent, relay simply not responding

Test oven temperature control after isolating power to the element manually

Confirmed that once the element was properly cut from power, oven temperature dropped and stabilized normally.

Relay isolated as the sole point of failure

The Root Cause: A Control Board Relay Stuck Closed

The control board's relay responsible for switching power to the bake element had failed in the closed position, meaning it kept supplying power to the element continuously regardless of what the temperature sensor reported or what signal the board sent to open it. The sensor and the rest of the control board were working correctly and trying to regulate temperature normally, but the relay itself was mechanically unable to respond, so the element never actually turned off.

The Fix & The Result

Fixed by Replacing the Control Board

The technician replaced the control board, since the relay is not a separately serviceable component on this model, tested the bake element’s cycling behavior through multiple full preheat and hold cycles, and confirmed the oven maintained accurate, stable temperature with no continuous heating before completing the visit.

The oven now cycles on and off normally and holds temperature accurately, with no further scorching or burning smell. This is the outcome we aim for on every overheating call: confirm exactly which component in the control chain has failed, since a relay failure requires a different fix than a bad sensor, and treating it as urgent from the start matters given the safety stakes involved.

Beyond This Case

Common Causes of an Oven Overheating

Not every case matches this one. Here are the most common reasons an oven overheats, from easiest to most involved.

Cause	How Common	DIY Fixable?
Miscalibrated temperature sensor (mild overheat)	Common	Sometimes, some ovens have a user calibration setting
Control board relay stuck closed	Less common	No
Stuck mechanical thermostat (older ovens)	Less common	No
Wiring fault keeping the element energized	Less common	No
Element not cycling due to a control board fault	Less common	No
User error (incorrect mode, e.g., broil instead of bake)	Common	Yes

Brand-Specific Notes

This Happens Across All Major Brands

Control board relay failures causing overheating show up across all major brands we service, including GE, Whirlpool, Samsung, KitchenAid, and Bosch. Our certified appliance technicians have experience diagnosing oven overheating issues across all these brands and more.

Prevention

Stay Safe and Catch Overheating Early

Stop using the oven and call for service if you notice a persistent burning smell or food scorching well ahead of schedule
Never leave an oven suspected of overheating running unattended
Have ovens serviced periodically, especially older units where mechanical thermostats and relays see years of cycling
Don't attempt to diagnose or bypass a stuck relay or thermostat yourself, this is an electrical safety issue
Keep a working smoke detector near the kitchen as a general precaution, independent of any single appliance

Before You Call

DIY vs. Calling a Professional

Reasonable to try yourself

Confirming the correct cooking mode is selected (not broil when bake was intended) is a reasonable first check.

Call a certified technician

Any suspected overheating beyond that, especially with a burning smell, scorching, or an oven that won't stop heating, should go straight to a certified technician rather than being diagnosed or bypassed at home, since this involves both electrical safety and fire risk.