Samsung Dryer not heating
Quick answer: The drum turns and air blows, but it comes out cold or barely warm, so clothes never dry. On electric dryers the usual suspects in order are a broken heating element, a blown thermal fuse or thermal cutoff, a failed cycling or high-limit thermostat, and a tripped leg of the 240 volt breaker.
- Unplug the dryer before testing any heater parts; the element circuit carries 240 volts.
- Let the heater housing cool completely before touching it.
- On gas models, close the gas shutoff valve before removing the burner assembly and never test the igniter with the gas line disconnected in an enclosed space.
Why is my dryer running but not heating?
The drum turns and air blows, but it comes out cold or barely warm, so clothes never dry. On electric dryers the usual suspects in order are a broken heating element, a blown thermal fuse or thermal cutoff, a failed cycling or high-limit thermostat, and a tripped leg of the 240 volt breaker. On gas dryers it is most often a weak igniter, failed gas valve coils, a dirty flame sensor or a blown thermal fuse in the burner circuit.
Our fitment data covers 525 Samsung dryer models and 926 Samsung dryer parts, so the part links below are filtered to this brand; always confirm your model number before ordering.
Most Likely Causes, in Order
1. Burned-out heating element (electric)
The coiled wire inside the heater housing eventually breaks from thermal cycling, especially when restricted airflow makes it run hotter than designed. A broken coil means no current flows and no heat is produced.
How to check: Unplug the dryer and remove the rear or lower panel to reach the heater housing. Disconnect the element wires and test across its terminals with a multimeter on the ohms scale: a good element reads roughly 8 to 15 ohms, while an open reading means it is broken. Also test from each terminal to the metal housing; any continuity there means the coil is shorted to ground and must be replaced.
Fix: Replace the element, or the complete heater housing on models where the coil is not sold separately. Clean the blower and exhaust duct at the same time so the new element does not overheat. (Difficulty: Moderate)
No Samsung part for this cause is in our catalog yet; search by your model number.
2. Blown thermal fuse or thermal cutoff
Electric dryers carry a thermal cutoff on the heater housing and gas dryers a thermal fuse on the blower housing, both in the heat circuit. When restricted airflow lets temperature climb past the safety limit, the fuse opens permanently and the heater or burner loses power while the motor keeps running.
How to check: Unplug the dryer and locate the small fuse on the heater housing or blower housing. Remove both wires and check continuity across the terminals; any open reading means it has blown. Because these fuses only blow when the dryer overheats, inspect the lint screen, blower wheel and exhaust duct for the underlying blockage.
Fix: Replace the fuse and the high-limit thermostat it is usually sold with, then clear the vent. Never bypass a thermal fuse; it is the last line of defense against a dryer fire. (Difficulty: Easy)
No Samsung part for this cause is in our catalog yet; search by your model number.
3. Failed cycling or high-limit thermostat
The cycling thermostat on the blower housing switches the heat on and off to hold the set temperature, and the high-limit thermostat on the heater housing cuts heat if the housing gets too hot. Either one stuck open leaves the heater circuit dead.
How to check: Unplug the dryer, remove the wires from each thermostat and test continuity across the two main terminals at room temperature. Both should read closed; an open reading means the thermostat has failed. A high-limit thermostat that is open often comes with a blown thermal cutoff, so test both.
Fix: Replace the failed thermostat; they mount with one or two screws and plug-in wires. Clean the exhaust path so the replacement is not exposed to the same overheating. (Difficulty: Easy)
No Samsung part for this cause is in our catalog yet; search by your model number.
4. Weak igniter or dirty flame sensor (gas)
The igniter must glow hot enough for the flame sensor to open and let the gas valve fire. A cracked or aged igniter never reaches temperature, and a dirty or failed flame sensor never signals the valve, so the burner stays cold.
How to check: Remove the lower front panel, start a heat cycle and watch the burner tube from a safe distance. If the igniter glows orange, goes dark and no flame appears, the gas valve coils are the problem; if it never glows, test the igniter for continuity with the dryer unplugged. Test the flame sensor for continuity at room temperature; it should read closed.
Fix: Replace the igniter, handling the new one only by its base since skin oil shortens its life. Replace the flame sensor if it reads open. (Difficulty: Moderate)
No Samsung part for this cause is in our catalog yet; search by your model number.
5. Failed gas valve coils (gas)
Two or three solenoid coils on top of the gas valve open it once the igniter is hot. As the coils age they work when cold but fail when warm, which is why the dryer often heats for the first few minutes and then runs cold.
How to check: Watch the burner: the igniter glowing, then shutting off with no flame, is the classic sign. With the dryer unplugged, test each coil for resistance; a coil that reads open or drifts far outside a few hundred to about two thousand ohms is bad. Coils are cheap enough that most technicians replace the set together.
Fix: Replace the coil kit; they lift off the valve after removing a small bracket, with no gas connection disturbed. (Difficulty: Easy)
No Samsung part for this cause is in our catalog yet; search by your model number.
6. Only one leg of 240 volt power (electric)
The motor and controls run on 120 volts but the heating element needs both 120 volt legs. If half of the double breaker trips or one cord wire burns at the terminal block, the dryer tumbles normally with no heat.
How to check: Turn the breaker fully off and back on. Unplug the dryer and inspect the terminal block for a burned or loose wire. With the outlet powered, carefully measure 240 volts across the two outer slots; a reading near 120 means one leg is dead.
Fix: Replace a damaged cord or terminal block. A breaker that will not hold both legs, or an outlet with a dead leg, is an electrician job. (Difficulty: Moderate)
No Samsung part for this cause is in our catalog yet; search by your model number.
Other Samsung parts the catalog tags for this symptom
- Dryer Thermal Cut-Off Thermostat DC47-00016A — $12.80 – $36.73 (blown; dry; won't start)
- Dryer Door Switch DC64-00828B — $35.44 – $60.82 (door not detected; dry; won't start)
- Dryer Thermal Cut-Off Fuse, 320-degree F DC47-00015A — $26.09 – $39.36 (dry; dryer won't run; no heat; won't heat)
- Dryer High-Limit Thermostat DC47-00017A — $78.88 – $86.98 (dry; overheating)
- Samsung Dryer Heating Element Assembly DC93-00154A — $216.97 – $255.84 (dry; no heat; not heating properly; won't heat)
- Dryer Belt Switch 3405-001077 — $19.22 – $29.60 (broken; dry; intermittent operation; won't start)
Popular Samsung dryer models
Confirm the model number on the rating plate before ordering. Each model page lists every compatible part.
Frequently Asked Questions
How do I know if it is the heating element or the thermal fuse?
Test both with a multimeter, since either can cause no heat. A blown thermal fuse or cutoff reads open and usually comes with a clogged vent; a broken element reads open across its own terminals. On many electric dryers the fuse blows first and takes the element with it, so check every part in the heater circuit before reassembling.
Why does my gas dryer heat for a few minutes and then go cold?
That pattern almost always means the gas valve coils are failing. They open the valve when cold but drop out as they warm up, so the flame lights at the start of the cycle and then will not relight. Replacing the coil set normally fixes it.
Can a clogged vent cause the dryer to stop heating?
Yes, indirectly. Restricted airflow lets heat back up in the heater housing until the thermal cutoff or high-limit thermostat opens. Replacing the fuse without cleaning the vent means it will blow again within a few loads.
When to Call a Professional
Call a professional if you smell gas, if the burner lights with a yellow or roaring flame, if the wiring or terminal block shows burn marks, or if the element and every thermostat test good and the fault seems to be in the control board. Gas valve replacement beyond the coils should be left to a licensed technician.