The short answer
A dryer that will not start almost never has a failed motor. It is waiting on a door switch, it has lost a supply leg, or a one-shot fuse has opened because the duct is blocked. All three are cheap to identify. Listen when you press start: a hum without rotation means the motor is being asked to run and cannot, while complete silence means the control is not asking it to. On a Smeg dryer the cause that ranks first is thermal fuse open after a duct restriction.
What you observe
- The machine is completely dead — no lights, no beep — Either no power reaching the machine, or an opened fuse in the main circuit.
- A hum when start is pressed, but the drum does not turn — The motor is being asked to run and something is stopping it.
- NEAR MISS — the machine starts and stops after a few minutes — That is a cycle fault, and it usually means airflow or sensing.
Causes, most likely first on a Smeg dryer
- Thermal fuse open after a duct restriction — On many machines the one-shot fuse sits in the motor circuit, not just the heater circuit, so a blocked duct kills the whole machine at once. It ranks first on a Smeg dryer because a built-in installation breathes through a narrow cabinet cut-out, so anything airflow-related surfaces here long before it would on a free-standing machine.
- Door switch not making — The control will not run the motor until the door switch confirms the door is shut, and the switch plunger wears or the strike bends over years of use. Second on this platform: it is the most-used switch on the machine and the control will not move without it.
- Control lock or the wrong programme selected — A child lock, a delayed start or a programme that begins with a pause all look identical to a machine that will not start. Ranked here because it costs nothing and it is the cause most often missed on an electronically controlled machine.
- No power, or one supply leg lost — A tripped breaker, a half-tripped double breaker or an unplugged cord gives anything from a dead machine to a machine that tumbles cold. Last, and the reason to work down the list rather than guess: it is upstream of the appliance entirely and it takes one minute to rule out.
Check in this order, and why
- Check when the machine last dried slowly, and check the duct — A history of long cycles followed by a dead machine is a blown fuse.
- Open and shut the door firmly, listening for a definite click — No click, or a soft one, is the answer before anything else.
- Look for a lock or clock symbol and hold the marked key to clear it — Free, instant, and it rules out the whole control path.
What an owner can safely check
- Disconnect the duct at the machine and check airflow at the outside vent — Clearing the duct comes before the fuse is replaced, always.
Tools: duct brush, screwdriverAbout 30 min
- Press the door firmly closed and hold it while pressing start — If it runs while held, the switch or the strike is worn.
About 5 min
- Hold the key marked with a lock until the symbol clears, then reselect a programme — Turn the machine off at the wall for a minute if the panel is confused.
About 5 min
- STOP HERE — the next check means a meter, a panel, or both — The ranking above tells you what to ask for; it does not make the remaining tests owner work.
Before you open anything
Safety
Unplug the dryer or switch off its breaker before removing any panel, and never tape or wedge the door switch to keep the machine running. On a gas machine, shut the appliance gas valve before moving it.
When to call a technician
Call once the supply and the door are ruled out, and call immediately if the machine hums without turning or the breaker trips when you press start. On a European-controlled machine, ask what the control was reporting when it stopped — it usually records why it aborted, and that shortens the visit.
Nearest pages of this class
What this page does not cover
This is the generalized page for a Smeg dryer. It does not carry anything model-specific: no part numbers, no wiring colours, no panel sequence and no torque figures, because those differ between families sold under the same badge. Where a family- or model-level page exists it is linked above, and it is the more specific answer of the two.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
