Appliance Won't Start — Common Causes & Parts

Appliance Won't Start

When an appliance has power but won't start, the problem is usually one of these components.

Work through the section for your appliance below, from the most common cause to the least common. Most "won't start" repairs cost under $30 in parts once the actual cause is confirmed, since the parts involved are almost always small switches, fuses, or relays rather than motors or drums.

Washer Won't Start

1. Lid Switch / Door Latch — Most common. The safety switch prevents operation when lid/door is open. Test with multimeter.
2. Control Board — Look for burnt components or failed relays on the board.
3. Timer (older models) — Timer motor fails and the cycle never advances to start.

On most top-load washers the lid switch sits under the top panel near the hinge; on front-load washers it is the door latch and strike plate behind the door boot. Neither requires removing the outer cabinet or the drum to access, which is why it is worth checking first.

Dryer Won't Start

1. Door Switch — #1 cause. Broken door switch = dryer won't run even with door closed.
2. Thermal Fuse — Blown fuse cuts all power to controls and motor.
3. Start Switch — The push-to-start switch itself fails.

The door switch is mounted in the door frame or on the front panel behind the door strike. If the door switch and thermal fuse both test fine, check the start switch on the console next -- these three parts account for the large majority of "dryer won't start" and "start button not responding" cases.

Dishwasher Won't Start

1. Door Latch — Dishwasher won't run unless the door latch is fully engaged and the switch activates.
2. Control Panel — Child lock enabled accidentally, or control board failed.
3. Thermal Fuse — Cuts power to controls after overheat event.

Check the door latch first -- it is the least expensive part and the most common cause. If the latch is intact and the door closes firmly, move on to the control panel (a "control panel not responding" complaint usually means the board itself, not the buttons) and then the thermal fuse.

Range / Oven Won't Turn On

If you searched for "oven won't turn on" or "burner not lighting," work through these in order:

1. Igniter — On gas ranges, the oven igniter must glow hot enough to draw enough current to open the safety valve. A weak or cracked igniter is the most common reason an oven won't start heating, and it can look identical to a "won't turn on" complaint.
2. Spark electrode / spark module — On gas cooktops, each burner has its own electrode; if it stops clicking or sparking, that burner won't light even though gas is flowing.
3. Control board — On electric and digital-control ranges, a failed board can prevent any element or the oven from receiving power at all.
4. Door switch / oven lock — On self-cleaning models, a stuck or failed door lock switch can prevent the oven from starting any cycle.

Refrigerator Won't Start (Compressor Not Running)

Refrigerators rarely "won't start" the way a washer or dryer does, but a "refrigerator compressor not running" complaint is the same category of failure -- the unit is plugged in and the interior light works, but nothing is actually cooling.

1. Start relay — The most common cause. This small relay kick-starts the compressor motor; when it fails, the compressor hums for a second or does nothing at all.
2. Compressor — Less common and more expensive to replace. Usually diagnosed only after the start relay and thermostat test normal.
3. Temperature control thermostat — If it is not calling for cooling at all, the compressor circuit never energizes.
4. Main control board — On electronic models, a failed board can cut power to the entire cooling system.

How to Test These Parts

• Switches (lid switch, door switch, door latch): Unplug the appliance, access the switch, and test it with a multimeter set to continuity -- press the switch by hand and confirm continuity changes from open to closed. No change means the switch has failed.
• Control boards / control panels: Inspect visually for burnt, cracked, or bulging components before testing anything electrically. A board with no visible damage can still have failed, so it is usually the last part checked, after the switches and fuses test normal.
• Thermal fuses: Unplug the appliance and test the fuse for continuity with a multimeter. Zero continuity means it has blown and must be replaced -- on dryers, also check the exhaust vent for a lint blockage, or the new fuse will blow again.
• Igniters and spark electrodes (gas ranges): Watch the igniter glow when the oven calls for heat, or listen for the spark electrode clicking when a burner knob is turned. A weak glow or no click points to that part.
• Start relays (refrigerators): Remove the relay from the compressor terminal and shake it gently -- a rattle usually means an internal contact has broken loose.

Related searches this guide answers include: "washer won't start," "washer lid won't lock," "control board failure," "dryer won't start," "start button not responding," "dishwasher won't start," "control panel not responding," "oven won't turn on," "burner not lighting," and "refrigerator compressor not running."

How to Confirm Before You Buy a Part

Before ordering any replacement part, take a minute to confirm the fit -- it is the difference between a repair that works the first time and a part that gets sent back.

1. Find the model/serial plate. It is usually inside the door frame, on the back panel, on the door edge, or under a front kick panel, depending on the appliance. See how to find your model number for exact locations by appliance type.
2. Read the full model number exactly as printed, including letters and dashes -- manufacturers often reuse near-identical model numbers across different production years that take different parts.
3. Verify the part fits that model using our model and part lookup tool before ordering, rather than relying on a part looking similar to the one you are replacing.

The full model number matters more than the brand and appliance type alone: manufacturers commonly use one body design across many model numbers over several years, and change the exact door switch, control board, or pump partway through that run. Two washers that look identical sitting side by side can still take different parts if their model numbers differ, even by a single trailing letter or digit -- which is exactly why the full number, not just the brand, is what a parts lookup needs to return the correct result.

Related Symptoms

If this is not quite the problem you are seeing, check the other symptom guides, or browse the full list of 87 repair symptoms.

Still not sure? Use the model and part lookup tool to search by your appliance model number directly.