Dryer Won't Turn On? It's Usually a Switch or a Fuse, Not a Dead Dryer

A dryer that won't start feels like the worst version of a dryer problem, because nothing happens at all. In practice, the usual causes are some of the smallest parts in the machine. A dryer has a chain of switches and safety parts that all have to agree before the motor is allowed to run, and when one link in that chain fails, the whole machine just sits there.

First, rule out the things that aren't the dryer

A few checks cost nothing and take two minutes:

• The breaker. Electric dryers run on a 240-volt circuit through a double breaker. If it has tripped, or the dryer is only getting part of that power, you can get odd, partial symptoms: the panel lights up, but the drum won't turn or it won't heat. Flip it fully off, then back on. If it trips again right away, leave it off and call
• The plug. Dryers get pushed back against the wall, and the plug can work its way loose. Gas dryers plug into a regular outlet, so that's worth checking too
• The control lock. Many newer dryers have a child or control lock that's easy to set by accident, and a locked panel ignores the Start button

If you want to look further than that yourself, unplug the dryer first, and on a gas dryer, leave anything connected to the gas line alone.

The three parts that usually cause it

The first is the door switch. The dryer won't run with the door open, and it relies on a small switch to know the door is shut. When that switch wears out, or the latch or the tab that presses it breaks, the dryer thinks the door is always open. If the door feels loose when it closes, or you have to lean on it to get the dryer to start, that's a strong hint.

The second is the thermal fuse, the same one-time safety fuse from our post on dryers that run but won't heat. Depending on the make and model, a blown thermal fuse either cuts the heat, or it's wired so the whole dryer won't start. Either way, it blew because the dryer ran too hot, and that almost always traces back to a restricted vent.

The third is the start switch. On dryers with a separate push-to-start button, the contacts inside it wear out with use. The button feels normal, but nothing on the other side of it is connecting anymore.

When it's something else

Listen when you press Start. If you hear a hum but the drum doesn't turn, let go of the button. That means the start circuit is doing its job and the problem is further down the line: the motor, or something binding the drum. On some models a broken drive belt also stops the dryer from starting, because a switch on the idler senses the belt is gone. And if the dryer does run but makes a loud thumping or grinding noise, that's usually the drum rollers or the idler pulley, and worth catching early before a small repair becomes a bigger one.

Is it worth fixing?

Almost always. A dryer that won't start is rarely a dryer at the end of its life, since the usual causes are a few small switches and a fuse. We'd only start talking replacement if it turns out to be the motor on an older machine, or if this is one of several unrelated problems showing up in a short stretch.