Dryer
Dryer Won't Start? Here's How to Find Out Why
Press start and nothing happens — no tumble, no sound, no heat. Work through this in order: two causes need zero parts, so rule those out first.
Last verified September 20, 2026
Start here
Before you begin, make sure the dryer is plugged in and set up normally —door not fully closed, or the door switch isn't detecting it's closed.
Start troubleshootingSafety notice
Unplug the dryer before testing or replacing the door switch, thermal fuse, or start switch.
View detailed safety tipsMost Likely Causes
Based on common issues for this problem.
- 1Door not fully closed, or the door switch isn't detecting it's closed
- 2Blown thermal fuse (the single most common cause — usually the result of a clogged vent that let the dryer overheat)
- 3Tripped circuit breaker or a power cord not fully plugged in
- 4Faulty start switch
- 5Broken drive belt (motor may hum, but the drum won't turn)
Also described as: “dryer won't turn on”, “dryer has no power”, “dryer won't start when I press start”, “dryer button doesn't do anything”
Where to Start
Before assuming a part has failed, rule out the two causes that need zero parts: the door not fully latched, and no power actually reaching the dryer. Both produce the exact same symptom as a real failure — nothing happens when you press start.
Safety Notes
- Unplug the dryer before testing or replacing the door switch, thermal fuse, or start switch.
- A blown thermal fuse is a safety device, not a random failure — it almost always means the dryer overheated from a restricted vent. Check and clear the vent first, then replace the fuse.
If your dryer does nothing when you press start — no tumble, no sound, no lights, or a hum with no movement — the cause is almost always one of a small handful of things, and two of them need zero parts to fix.
Check these two things before anything else
Is the door fully closed? Every dryer has a door switch that has to register “closed” before it will start. Something blocking the door, or a switch that isn’t clicking, produces the exact same symptom as a real failure.
Is the dryer actually getting power? Check that the control panel lights up (or, on older timer-dial models, that the drum light turns on with the door open). No lights usually means a tripped breaker or a loose power cord — not a failed internal part.
Once both of those are confirmed, work through the checks below in order — they’re arranged from the quickest tests to the ones that take more time.
Diagnostic Steps
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Confirm the door is fully closed
- What to look for
- Anything blocking the door from latching completely, and whether you hear a click when it closes.
- What it indicates
- The door switch has to register 'closed' before the control board allows the dryer to start at all — an unlatched door produces the exact same symptom as a switch failure.
- What to do
- Clear anything blocking the door and close it fully until you hear the click.
- If nothing changes
- Move to checking power.
Check power
- What to look for
- Whether the control panel lights up. On older timer-dial dryers with no lit panel, open the door and check if the drum light turns on.
- What it indicates
- No lights at all usually means the dryer isn't getting power — not a failed internal part.
- What to do
- Check that the power cord is fully seated, and check the circuit breaker for the dryer's circuit.
- If nothing changes
- If power is confirmed and the door is fully closed, test the door switch.
Test the door switch
- What to look for
- Continuity with a multimeter when the switch is pressed (dryer unplugged) — you should read continuity only while it's pressed, since it's a momentary contact.
- What it indicates
- No continuity when pressed means the switch has failed and the control board never sees the door as closed, even if it physically is.
- What to do
- Replace the switch if it fails continuity. This is a low-cost, straightforward repair.
- If nothing changes
- Test the thermal fuse.
Test the thermal fuse
- What to look for
- Continuity with a multimeter (dryer unplugged). The fuse is usually on the blower housing or near the heat source.
- What it indicates
- No continuity means it's blown. It cannot be reset — only replaced. Because it blows from overheating, a blown fuse is usually a symptom of a restricted vent, not a random part failure.
- What to do
- Replace the fuse, but check and clear the vent first — replacing it without fixing the underlying overheat cause means it blows again.
- If nothing changes
- Test the start switch.
Test the start switch
- What to look for
- Continuity with a multimeter when the switch is pressed or turned (dryer unplugged).
- What it indicates
- If the switch doesn't show continuity when activated, it's failed — pressing start does nothing because the signal never reaches the motor.
- What to do
- Replace if it fails continuity.
- If nothing changes
- Check the drive belt.
Check the drive belt
- What to look for
- A humming sound with no drum movement when you press start — a strong hint even before you look. Visually inspect the belt for breakage once you can access it.
- What it indicates
- A broken belt means the motor can run (hence the hum) while the drum stays still, since the belt is what transfers motor power to the drum.
- What to do
- Replace the belt if it's broken or badly worn.
- If nothing changes
- If the door switch, thermal fuse, start switch, and belt all test fine, the main control board or timer is the likely remaining cause — by elimination.
What Not to Do
- Don't replace the thermal fuse without checking the vent for a clog — it's very likely why the fuse blew, and skipping this means it blows again.
- Don't assume the drive motor has failed before ruling out the belt, thermal fuse, door switch, and start switch — actual motor failure is comparatively rare, and those other parts fail far more often.
Frequently Asked Questions
My dryer hums when I press start, but the drum doesn't move — what's wrong?
That points to the drive belt first — a broken belt lets the motor run while the drum stays still. If the belt is intact, something may be physically jamming the drum from turning.
Why does my thermal fuse keep blowing after I replace it?
This almost always means the vent is still restricted somewhere. The fuse is doing its job — it trips because the dryer is overheating, and replacing it without clearing the underlying blockage just sets up the same failure again.