Removing and replacing a kitchen exhaust fan motor is a fairly straightforward home improvement project that most homeowners can tackle themselves. The process involves turning off power to the fan, removing the fan blades and housing, disconnecting the wiring, removing the motor mounting brackets or screws, and installing the new motor. Proper safety precautions should be taken, including using a ladder for high ceilings and wearing protective equipment. With some basic mechanical skills and the right tools, you can replace your kitchen exhaust fan motor and get your fan working again quickly.
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When Do You Need to Replace the Motor?
There are a few signs that indicate it may be time to replace your kitchen exhaust fan motor:
- The fan is making loud noises, rattling, buzzing, grinding, etc.
- The fan blades are spinning slower than normal or not at all.
- The fan is not effectively removing smoke, steam, odors from the kitchen.
- The motor is overheating, smells burnt, or is hot to the touch.
- You can see visible damage to the fan motor like cracked or broken housings.
If you notice any of these issues with your kitchen exhaust fan, it likely means the motor is worn out or defective and needs to be replaced. Continuing to use a damaged motor can lead to total failure, electrical issues, or fire hazards.
How to Remove a Kitchen Exhaust Fan Motor:
Here are the step-by-step instructions for removing your existing kitchen exhaust fan motor and installing a new one:
Turn Off Power and Lock Out Electricity
Before doing any work on your kitchen exhaust fan, you must turn off power to the fan at the circuit breaker. Turn the appropriate breaker to the “off” position. Use a padlock to lock out the circuit breaker so it cannot accidentally be turned on while you are working on the fan.
Remove Fan Blades
Once power is disconnected, remove the fan blades from the motor shaft. There will likely be a set screw or fastener holding the blades in place. Loosen this with a screwdriver, pliers or Allen wrench and carefully pull the fan blades straight off the shaft. Set them aside somewhere safe.
Remove Fan Housing
Next, remove the fan housing, or dome, that encloses the motor. This may be secured with screws around the edges that need to be unscrewed. Support the weight of the housing while removing the final screws. Carefully lower the dome down once detached.
Disconnect Wiring
Find where the motor wiring connects to the fan wiring and disconnect the connectors. This will allow the motor to be completely detached. Make sure to label the wires so you know how to properly reconnect them later. Often there will be color coded wires or tags on the connectors indicating power supply, ground, neutral, etc.
Remove Mounting Brackets/Screws
The fan motor will be attached to the housing with mounting brackets or screws. Remove these to fully detach the motor. Be careful when handling the motor so you do not damage the wiring.
Install New Motor
Now you can install the new replacement exhaust fan motor. This usually involves reversing the steps above:
- Attach the new motor to the housing with the mounting brackets or screws.
- Reconnect the wiring to the terminals, matching wire colors and connectors.
- Reinstall the fan dome and secure with the screws around the edges.
- Replace the fan blades on the motor shaft and tighten the set screw.
Double check that the new motor is securely installed before reconnecting power.
Reconnect Power
Once the new exhaust fan motor is completely installed, you can reconnect power to the fan. Turn the circuit breaker back on at the panel and remove the padlock. Test the fan to make sure the new motor powers on and runs properly. Reinstall any access panels before using your kitchen exhaust fan again.
Tips and Warnings
Here are some additional tips to follow and safety precautions when removing and replacing your kitchen exhaust fan motor:
- Use a sturdy ladder or step stool to safely reach the fan if mounted on a high ceiling.
- Wear protective equipment like safety goggles, gloves, long sleeves/pants.
- Support the weight of the motor when removing to avoid dropping.
- Cap or tape exposed wires when disconnecting the motor.
- Take photos before and during the process to help with reassembly.
- Consult the manufacturer’s instructions if available.
- Hire an electrician if you are uncomfortable working with electrical wiring.
- Dispose of old motor according to local regulations.
Replacing a kitchen exhaust fan motor requires working with electrical connections and at heights, so proper precautions are necessary. With some mechanical ability and safety awareness, however, it is a DIY project most homeowners can successfully complete.
Cost to Replace a Kitchen Exhaust Fan Motor
If you choose to hire a professional instead of replacing the exhaust fan motor yourself, expect to pay $150-$500 or more depending on the exact fan model and complexity of the job. Labor will account for much of this cost. The motor itself may range from $50-$250 or more depending on the motor type, power, and manufacturer. There may also be a service or diagnostic fee.
Factors Affecting Replacement Cost
Some of the factors that influence the total cost to replace a kitchen exhaust fan motor include:
- Fan location – easer access lowers cost
- Motor type – universal, shaded pole, PSC, etc.
- Single motor vs dual/multi-motor fan
- Need for wiring upgrades or repairs
- Time for removal and installation
- Contractor’s hourly rate and service fees
Simple motor swaps will be on the lower end while more complex jobs or premium fan models cost more. Get multiple quotes to find the best rate.
Conclusion
Removing and replacing the motor on your kitchen exhaust fan is a worthwhile DIY project that can save you money compared to hiring an electrician. Make sure power is disconnected, remove fan components to access the motor, swap in the new one, and reassemble carefully. With proper safety precautions, you can avoid hazards and enjoy a smoothly running fan. Consider having a professional take care of it if electrical work makes you uncomfortable.