Range Hood Fan Will Not Turn On - Switch Works but Motor Does Not Run

A range hood fan that does nothing when you flip the switch has either a failed motor, a bad capacitor, or a thermal overload that tripped. The switch itself is rarely the problem.

Category:Kitchen

Difficulty:Moderate

Time:30 min

Success:50%

Updated:May 27, 2026

quick_referenceQuick Answer

For Range Hood Fan Will Not Turn On - Switch Works but Motor Does Not Run, start with "Remove the filters and look inside the hood for the motor": Pop off the grease filters (they slide or snap out). Look into the cavity behind them. The motor is a small cylinder with a squirrel cage fan on one side. It is held by mounting clips or screws. Check the motor shaft - if it is frozen and the fan blades do not turn by hand, the motor is seized. Stop DIY if the motor is buzzing loudly but the fan is not turning - the capacitor is dead. running the motor in this state will damage the windings. This is listed as a moderate recovery and usually takes about 30 min.

verifiedGuide Snapshot

Repair areaKitchen

Estimated time30 min

DifficultyModerate

Stop conditions4

Last updated May 27, 2026. Review the stop conditions before continuing.

account_treeRecovery State

DeviceRange Hood

Current stateFan Not Working

Specific stateMotor Wont Start

Failed stepFan Activation

Likely failure typeElectrical Fault

DIY boundaryDIY recovery first

paymentsCost decision

help1. Understand the Problem

The range hood fan motor is a single-phase AC motor. When the switch is on and the fan will not run, the usual causes are a failed motor winding, a dead capacitor (which starts the motor), or the thermal fuse inside the motor tripped from overheating. All are repairable.

build_circle2. Try This First

Best First Step

Remove the filters and look inside the hood for the motor

Pop off the grease filters (they slide or snap out). Look into the cavity behind them. The motor is a small cylinder with a squirrel cage fan on one side. It is held by mounting clips or screws. Check the motor shaft - if it is frozen and the fan blades do not turn by hand, the motor is seized.

visibility3. Visual Guidance

See what's happening and how to try the first recovery step.

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Check the capacitor - it is the most common failure point on range hood motorsThe capacitor is a small metal cylinder attached to the motor with two wires. It stores energy to start the motor. If it is swollen, leaking, or smells burnt, it is failed. Test it with a multimeter set to capacitance mode - a reading far below the rated microfarads means it is dead.

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Test the motor windings with a multimeterDisconnect the motor wires. Set the multimeter to ohms. Touch one probe to each motor terminal. A working motor reads 10-50 ohms. If it reads 0 ohms (dead short) or infinite ohms (open winding), the motor is dead and needs replacement.

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Check the thermal fuse on the motor - it resets after coolingMany range hood motors have an internal thermal fuse that trips when the motor overheats. Let the motor cool for 30 minutes. If the fan works after cooling but stops again when run on high for 10 minutes, the thermal fuse is weak. The motor needs replacing - thermal fuses are not user-replaceable.

autorenew4. If That Doesn't Work

Try the next recovery options.

electrical-services

Replace the capacitor first - it is cheap and often the only problemCapacitors fail before motors do. Buy a replacement capacitor matching the microfarad and voltage rating of your motor. Install it carefully - the capacitor can hold a charge even when unplugged. Discharge before handling.

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build

Replace the whole motor unit if the windings are deadIf the motor is seized or the windings are open, replace the motor. Search for your brand and model number plus range hood motor to find the correct replacement. Many motors are generic - match the voltage, horsepower, and shaft size.

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Frequently Asked Questions

Why did the range hood motor fail?expand_more

Grease and moisture are the two main killers. Grease accumulates on the motor windings and acts as insulation, causing the motor to overheat. Moisture from cooking steam corrodes the motor shaft bearing. Clean filters regularly to extend motor life.

Is it worth replacing the motor or should I replace the whole hood?expand_more

If the hood is less than 10 years old and the motor is available, replace the motor. Motors cost $30-$80. A full hood replacement with installation is much more. If the hood is very old, the new motor may not fit a discontinued model - check carefully.

Can I run the hood without the filters?expand_more

You can, but it accelerates motor failure. Filters trap grease before it reaches the motor. Without them, the motor accumulates grease and overheats faster.