Why Won't My Dryer Start?
The causes range from simple (door switch) to moderate (control board) — all diagnosable in one visit.
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A dryer that doesn't respond when you press Start — or that powers on but won't begin cycling — has a break in the circuit chain between the power supply, the safety interlocks (door switch, thermal fuse), and the control system. The door switch is the most common single cause, accounting for a large proportion of no-start calls across all brands.
Common causes
Failed door switch
The door switch is the most common cause. It is a safety interlock that must signal the control board that the door is securely closed before the dryer is allowed to operate. Door switches on most brands use a physical plunger that triggers an internal microswitch. The switch can fail in the open position — appearing to click normally but making no electrical contact.
Blown thermal fuse
On most dryer designs, the thermal fuse is wired in series with the motor control circuit, not just the heating circuit. A blown thermal fuse therefore prevents the dryer from starting at all — not just from heating. Most thermally-fused dryers that won't start have either a door switch failure or a thermal fuse failure.
Failed start switch or button
The physical start button's internal contacts wear over time. On electronic control models, the start button's membrane contacts can separate from the control board. On older electromechanical models, the push-start switch in the timer can fail.
Control board failure
Electronic dryer control boards can fail from power surges, moisture exposure, or component age. A failed board produces no response to any panel input. A completely dark or unresponsive display on an electronic model strongly suggests a control board or power supply fault.
Power supply problem
Electric dryers require a dedicated 240V/30A circuit. A partially tripped 240V circuit breaker — which leaves one of the two 120V legs energized — can produce a condition where the control panel lights up but the dryer won't start. Cycling the breaker (fully off, then fully on) is the first step.
Child lock or control lock active
Many modern dryers have a control lock feature. An accidentally activated control lock prevents all button input. The lock indicator light (typically a padlock icon) indicates this state. The unlock procedure varies by brand.
Can I fix this myself?
Before scheduling service: (1) Check the door is fully latched — a door that is not engaging the switch completely will prevent starting. (2) Cycle the circuit breaker: turn the dryer breaker fully off, wait 30 seconds, then turn it fully on. A partially tripped 240V breaker is a common no-start cause. (3) Check for a control lock indicator on the display — consult the owner's manual for the unlock sequence. (4) On some models, pressing and holding Start for 3–5 seconds initiates a start cycle and clears a locked condition.
If the basic steps above don't restore operation, internal electrical diagnosis involves live 240V circuit components and should be handled professionally. Testing a door switch or thermal fuse requires a multimeter and knowledge of which terminals to probe. Never probe terminal block connections with the dryer connected to power.
Is a dryer worth repairing if it won't start?
For units under ten years old, repair is almost always the right choice. Most no-start causes are inexpensive components — door switch, thermal fuse, start switch — that cost far less than a replacement dryer.
Even a control board replacement — the most expensive common no-start repair — runs $200–$450 depending on the brand, which is still less than half the cost of a comparable new dryer in most cases.
When to schedule a repair
If cycling the breaker, checking the door latch, and confirming no control lock is active don't restore operation, the cause is an internal component failure requiring diagnosis and repair.
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