You load the dryer, press start and nothing happens. No hum, no click, maybe not even a light on the panel. A completely dead dryer feels like a big problem, but the cause is often simple, and checking things in the right order saves time and money.
Start with the power supply, then the door, and only then the parts inside the cabinet. Here is the same order our technicians follow on service calls around Calgary, with the safe checks you can do yourself along the way.
Dead, humming or no heat?
First, be clear about what "won't start" means for your dryer, because each symptom points somewhere different.
| Symptom | Likely cause | Who fixes it |
|---|---|---|
| No lights, no sound at all | Breaker, plug or power supply | DIY check first |
| Lights on, nothing when you press start | Door switch, start switch, control lock | DIY check, then technician |
| Lights on, no start (Whirlpool family) | Blown thermal fuse | Technician, plus vent check |
| Hums but drum does not turn | Motor, belt or seized idler | Technician |
| Tumbles but stays cold | Heat source or one breaker leg | Technician |
If your dryer hums, read dryer hums but won't start. If it runs but stays cold, signs of a failed heating element is the better place to start. The rest of this post covers a dryer that does nothing at all.
Step 1: Power to the dryer
Check the obvious first. It solves more service calls than you would expect.
The breaker
Electric dryers use a double breaker. Most gas dryers plug into a regular 120 V outlet on their own breaker. Switch the breaker fully off, then firmly back on. A tripped breaker can sit in a middle position that looks almost on. If the breaker trips again right away, leave it off, because that points to a short in the dryer, the cord or the house wiring.
The plug and the cord
Dryers get pushed back against the wall, and the plug can work loose. Make sure it is fully seated. A dryer should never run off an extension cord or power bar. Look for a scorched plug or a melted outlet, which needs an electrician.
Power failure codes
Some dryers remember an interruption. Whirlpool-built and LG dryers show PF after a power failure. If PF keeps coming back with no outage, the dryer needs service. Hisense dryers show F09 when the supply voltage is too high or too low, and Samsung shows 9E or 9C1 for an abnormal power supply. Those point to the house supply or the way the dryer is connected, so check the breaker and make sure no extension cord is involved before calling.
Step 2: Control lock, delay start and buttons
Many electronic dryers have a control lock that blocks the start button, often shown as a small padlock. A delay timer can also be set by accident. Your manual shows how to clear both, usually by holding one button for a few seconds.
A stuck button can stop the dryer too. Samsung shows bE when a control button is stuck or held down, GE shows 006 for a stuck button, and Electrolux shows EF8 when a key is stuck. Gently press around the button to see if it frees up.
Step 3: The door switch
Every dryer has a door switch that stops it running with the door open. If the switch fails, or the door does not press it fully, the dryer acts dead even though it has power.
- The drum light does not come on when you open the door, on models with a light.
- You do not hear a faint click when you press the door closed near the latch.
- The dryer starts if you push hard on the door, then stops when you let go.
Electronic models may show a door code. Samsung's dE, dC and dF codes mean a door, latch or door-sensor problem. LG's dE means the door is not fully closed, Bosch shows DR, and GE's 008 means the door switch has stuck closed after five cycles. More are on our error code lookup, and latch trouble is covered in dryer door won't latch or start.
Step 4: Thermal fuse, start switch and controls
The thermal fuse
On many Whirlpool-built dryers, including Whirlpool, Maytag, Kenmore, Amana and Inglis, the thermal fuse is wired into the motor circuit. When it blows, the dryer will not start at all, even though the panel may light up. On many other brands, a blown fuse means no heat instead. The fuse blows because the dryer overheated, usually from a restricted vent, so it must never be bypassed. Our post on why a thermal fuse keeps blowing explains the root cause, and our Whirlpool dryer repair page covers that family of dryers.
The start switch, timer or control board
If the dryer has power, the door switch works and the fuse is fine, the start switch itself may have worn out. It is a simple push switch, but it gets pressed thousands of times, and the contacts inside eventually stop closing. Beyond that, the timer on mechanical dryers, or the control board on electronic ones, can stop sending power to the motor. A dead display on an electronic dryer with good power at the outlet often points to the control board or its power supply.
The drive motor
A failing motor usually hums or buzzes rather than staying silent, but a motor with a burnt-out winding or a tripped internal overload can also do nothing at all. If the dryer starts again after it has cooled for half an hour, then quits, the motor overload may be tripping. That needs testing, because the cause can be a seized drum part as well as the motor itself.
Safe checks before you call
Work through these in order, and unplug the dryer before you reach behind it or into the door area. Most of these take only a minute or two.
- Reset the breaker fully off and on.
- Make sure the plug is fully in and there is no extension cord.
- Check the display for control lock, delay start or a paused cycle.
- Open and close the door firmly, and look for lint or clothing stopping it from latching.
- Clean the lint screen and check the hood outside. If the thermal fuse has blown, a clogged vent is the likely reason.
Never jump the door switch or bypass the thermal fuse to get the dryer going. Those parts prevent injuries and fires. If you have a gas dryer and smell gas, leave the house and call ATCO Gas emergency at 1-800-511-3447.
When to call a technician
If the dryer still will not start after these checks, the fault is in the door switch, thermal fuse, start switch, timer, control board or motor, and it needs testing with a meter. A technician can also find out why a fuse blew, so the new one does not fail next week.
Fast Appliance Repair fixes electric and gas dryers of every brand in Calgary, Strathmore, High River and nearby towns, usually the same day. Call (587) 779-6919. You get a flat diagnostic fee and a full quote before any work, and every repair carries our 90-day parts and labour warranty.