Samsung Oven Not Heating Over 175°? Here’s Why

If you’ve noticed your Samsung oven is not heating above 175°F, you’re probably thinking about calling in a professional. In some cases, however, this issue can be solved with some easy DIY remedies. Whether your oven has a heating issue, thermostat error, or is stuck in display mode, there are potential fixes you can try from the comfort of your own home. Read on to find out what to do!

This guide applies to all common models of Samsung ovens, including:

FCQ321HTUX

FE710DRS/XAA-0001

FER300SB

FER300SBXAB

FER300SW

FER300SX

FER300SX/XAA

FER300SXXAC

FER500WX

FTQ353IWUX/XAA

FTQ387LWGX/XAA

FX710BGS/XAA-0002

NE58K9430SS/AA-0000

NE595R0ABBB

NE595R0ABSRAA

NX58F5500SS/AA-0000

NX58H5650WS/AA-0001

RESF3330DB

RESF3330DW

RGSF3330DW XAA

RGSF5330DT XAA

Oven Stuck in Demo Mode

If your oven is not heating above 175°F, it may be stuck in demo mode. Demo, or display mode, is designed for showrooms, allowing salespeople to demonstrate an oven’s functions without using excessive heat. If this is your problem, the oven’s fan and display will still work, but it won’t heat properly. Your oven may also have the word “DEMO” on the display panel. This is most likely if you just purchased a new oven and it was accidentally left in display mode. 

To fix this:

• Consult your Samsung manual for the solution to demo mode in your oven model. In most models, you will need to navigate to the settings menu and then press the “options” and “start” buttons together at the same time. This will then allow you to toggle demo mode off. 
• If this doesn’t work, try resetting your oven. Turn the oven off at the circuit breaker, leave it without power for at least two minutes, then turn it back on. Check to see if it is still in demo mode. 
• If you’re still unable to get your oven out of demo mode, contact Samsung directly.  

Faulty Temperature Sensor

Another common cause of an oven that isn’t heating properly is a faulty temperature sensor. The temperature sensor detects the internal temperature of your oven and switches off the heating elements when the desired temperature is reached. If the sensor is faulty, the heating elements may be switched off prematurely, leading to an oven that doesn’t heat beyond 175°F. If this is your issue, you may notice your oven appears to start heating normally but will cease the heating process before the desired temperature is reached. 

To fix this:

• Locate the temperature sensor. In most models, this will appear as a small metal rod, usually around 2 inches long. It will be located inside the oven, most likely on the upper back wall. 
• Test the sensor with a multimeter to see if it’s functioning. It should read around 1000 ohms at room temperature. If it shows no continuity or a much higher or lower reading, then it’s faulty. 
• Source a replacement temperature sensor from a trusted online retailer. Ensure it is compatible with your model of Samsung oven. 
• Disconnect your oven from the power supply, then remove the faulty temperature sensor, making sure to take note of how the wiring is connected. 
• Put the new sensor in place and confirm it is properly wired in and secured. 
• Restore power to your oven then test to ensure it is now heating properly. 

Malfunctioning Heating Element

Another common cause of an oven that isn’t heating correctly is a faulty heating element. A typical oven has two main elements—the baked element at the bottom and the broil element at the top. If either of these elements is malfunctioning, your oven will struggle to reach the desired temperature. If one of your elements is malfunctioning, you may notice your oven takes a lot longer to heat than it should. You may also notice that either the top or bottom of your food is undercooked. 

Here’s how to fix it:

• Open your oven and inspect the heating elements for damage. If they appear cracked, warped, or otherwise damaged, they will need replacing. 
• If they appear normal, try turning on your oven and checking to see if they are both heating up evenly. They should glow a uniform shade of red, without hot or cold spots. 
• If you feel comfortable doing so, turn your oven off and test the elements with a multimeter to see if they have continuity. If not, they are not functioning and will need to be replaced. 
• Source replacement elements from an appliance parts retailer. 
• Remove the faulty elements, ensuring you take note of how they are secured and wired in place. 
• Put the new elements in place. 
• Restore power to your oven and run a test to ensure your Samsung oven is now heating above 175°F

Door Seal Issues

Ovens need a tight seal to achieve and maintain the correct temperature. If the door seals on your Samsung oven are loose or damaged, or if the door is misaligned, your oven will struggle to heat beyond 175°F. If this is your issue, you may have noticed your oven is throwing out more heat than usual, and that the air around your oven is very hot when it’s on. You might also have noticed it taking far longer than usual to achieve the desired temperature. 

To fix this:

• Open the oven door and check the seals. If they appear cracked, loose, or otherwise damaged, they will need to be replaced. 
• Check to ensure the oven door closes tightly. There should be no gaps at all when the door is closed. 
• If you’re unsure, turn your oven onto a fan bake cycle and wait until it begins to heat up. If you notice hot air escaping from around the door, then you have a door seal issue. 

There are two potential solutions to this problem. If this is due to a misaligned door, try tightening the hinge screws that hold the door in place, ensuring it is properly fitted. If the hinge is damaged, it might need replacing. If the problem is due to a worn or damaged seal, you can purchase replacement seals from an appliance parts retailer, and install them yourself according to the manufacturer’s instructions.