1. Find out whether it heats at all
- Warm but still damp? Clean the lint filter and check the vent first.
- Cold the whole time? Make sure you're not on Air Fluff, in Eco Dry's unheated start or in a cool-down stage.
- Never heated since it was installed or moved? Call the installer.
- Smell gas or see smoke? Get out and call for help from outside.
- Still cold after all that? Book a Samsung technician.
The drum turns and the timer counts down, but the laundry comes out cold, or warm and still wet. We'd work out which of those you've got before touching anything, because they point different ways. Warm but damp points to a blocked vent, while no heat at all starts with the cycle, the installation and the power supply.
The exhaust duct and gas supply checks are for US vented Samsung gas and electric dryers. Grab the model code first, since you'll need it for the manual and any service call. Look for the model code and serial number on a label around the door frame.
A ventless or heat pump model works differently, so skip the exhaust duct and gas supply checks. Use your model code to find your dryer's manual (opens in a new tab) and follow its maintenance steps. If your ventless dryer shows a Clean heat exchanger alert, follow its heat exchanger cover steps, then brush dust off the exchanger with the brush that came with your dryer.
On a ventless dryer, clean the lint filter using your model's instructions, check the cycle and load size, and wipe reachable sensor bars if Sensor Dry ends early. Then try a suitable heated cycle. If it still stays cold or damp, request Samsung service.
2. Photograph the display before you reset anything
Take a photo of the cycle, the options and any error code or flashing lights. We'd hold off on a reset, because wiping the error history makes it harder for a technician to find and fix the fault, and a reset won't clear a blocked vent anyway. Once you have the photo, check whether the dryer is in a heated part of the cycle.
If the display shows dn, the dryer is downloading a firmware update. Leave it plugged in unless there's an emergency, and request Samsung service if dn is still showing after 24 hours.
For any other code, look up the exact code (opens in a new tab) your dryer shows. Heating codes such as HC and hE mean the dryer is getting too hot. For those and the temperature codes, clean the lint screen and clear the vent, because a clog in either one traps heat inside.
On an electric dryer, a heating code can also show up when low voltage keeps the heater from getting hot enough, so call an electrician to check the supply. If a code keeps coming back after those checks, request Samsung service.
3. Make sure this part of the cycle should heat
| Cycle or stage | Why the load can feel cold |
|---|---|
| Air Fluff | It tumbles the load in room-temperature air, with no heat. |
| Eco Dry | It starts the cycle without heat and can take longer. On models that have it, it's on by default for Normal and Time Dry. |
| Wrinkle Prevent | It keeps tumbling without heat after drying has finished. |
| Cool-down at the end of a cycle | A finishing stage can run without heat. |
Check which cycle and stage your dryer is actually on, then pick a heated cycle and a temperature your fabric care labels allow. If your model has Eco Dry, turn it off for this comparison so its unheated start doesn't throw you.
If the load warms after that change, the cold air came from the setting or stage. If it never warms up during the heating part, move on to the lint filter and vent, then the power and installation checks. If it warms up but stays damp, look at the Dry Level and the load first.
A low dryness setting leaves some moisture on purpose, and steam cycles can leave laundry damp. Dry very heavy items separately from light ones before you judge another load.
4. Clean the lint filter, then look at the vent
With the dryer off and cool, clean the lint filter in the door opening if your model has that kind. A clogged filter keeps the dryer from heating well and is a fire risk, so clean it before and after every load.
- Open the door and pull the lint filter out of its slot inside the drum opening.
- Clear off the lint. If the filter is damaged or broken, replace it before you use the dryer again, because a damaged filter can cause a fire.
- Push the filter all the way back in, then close the door. Never run the dryer without it.
If your filter looks different or comes out another way, get that model's cleaning steps before you pull it. Then look at the exhaust duct and the outside hood, sticking to the parts you can see without moving a heavy or stacked dryer. For fire prevention, keep the exhaust clean (opens in a new tab) too.
A crushed duct, a blocked hood, or a hood flap that stays shut while the dryer runs all block airflow. Clear only what you can reach safely or book vent cleaning before trying another heated load.
Some vented Samsung dryers also have a built-in vent blockage test, which runs for about 2 minutes. If your manual lists it, follow the button steps for your exact model rather than a shortcut from another dryer.
Keep the exhaust connected whenever the dryer runs. Your dryer may not heat if it detects that heat and moisture aren't getting out, which is a safeguard against overheating and vent fires.
If the visible vent looks clear but the load stays cold, continue to the power and installation checks.
For a blockage you can't see or reach, book a professional dryer vent cleaning service. If your dryer isn't stacked and you can move it safely, our walkthrough on cleaning a dryer duct from the trap to the outside covers the shutdown precautions and the brush work.
5. Clean the sensor bars if Sensor Dry ends early
Sensor Dry reads moisture to decide when to stop. If you use a lot of dryer sheets, the coating they leave behind can build up on the sensor bars, so the dryer thinks the load is dry and ends too soon.
For bars you can reach inside the drum, you need two cloths and some mild soap. Don't open a service panel to get at them.
- Turn the dryer off and let it cool.
- Wipe the sensor bars with a soft cloth and mild soap.
- Dry the bars with the second cloth.
Run another suitable Sensor Dry load after cleaning. If it now runs until the clothes are dry, keep the bars clean. If it still ends early, write down the load size and how long it ran, and pass that on when you book service.
6. Check installation and supply if it stays cold
If the dryer has never heated since it was installed, moved or had its supply changed, we'd call the installer before booking a repair. Installation is the likely cause in that case, and appliance service isn't required yet. If the installer finds no problem and the dryer still stays cold, continue with the supply check.
Samsung electric dryers need a 240 volt, 60 Hz outlet. If the outlet isn't supplying enough voltage, the controls and motor can keep working while the heater doesn't, which is one way a dryer tumbles without heating.
For a power supply problem or a breaker that keeps tripping, call a licensed electrician. For a gas supply concern that isn't an emergency, call a qualified gas installer or your gas utility.
If a dryer that used to heat is still cold after the cycle, filter and vent checks, book a Samsung technician. Anything past these checks means opening the dryer, and that's their job. Before approving paid work, ask Samsung to check whether your warranty covers the repair.
Let the technician test the parts before you buy one. Ask for a written quote once the technician has found the fault.
Having these ready makes the first visit more useful.
Tick what applies and add details; the note above fills in as you go.
More questions about a cold Samsung dryer
What if the heat comes and goes?
Photograph any code and note the cycle and when the heat stopped. If the cycle, lint filter and vent checks are clear, give those details to the technician.
Should I buy a heating element because an HC or hE code appeared?
Wait for a diagnosis. Those codes point to overheating, and a heating code on an electric dryer can also appear with low voltage. Clean the lint screen and vent, and on an electric dryer have an electrician check the supply first.
How can I tell whether the check worked?
Run another suitable heated cycle. If the laundry warms and dries, keep cleaning the lint filter before and after each load.
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