Repairing Guides

how to repair exhaust fan

by Mr. Allen Kuvalis DDS Published 2 years ago Updated 1 year ago
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How to Repair an Exhaust Fan Motor

  1. Prepare. The first thing that you will need to do is get the electricity cut off in the bathroom. ...
  2. Remove Cover. Once you have the power turned off, you will need to get the cover removed. ...
  3. Inspect Fan. You will need to take a good look at your fan before you decide what is wrong with it. ...
  4. Pull out Exhaust Fan. ...
  5. Replace Motor. ...

Part of a video titled How to replace or repair a bathroom fan - YouTube
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So unplug the fan turn your wall switch on and plug in something like a blow-dryer. Into this plugMoreSo unplug the fan turn your wall switch on and plug in something like a blow-dryer. Into this plug here and if it doesn't turn on then your wall switch is the problem.

Full Answer

How do you repair a bathroom exhaust fan?

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How to fix a noisy bathroom exhaust fan?

We Have a Fix!

  • Insulate Your Bathroom Exhaust Fan. Insulating your bathroom fan is a remarkable way to reduce and even eliminate the sound vibrations you get while your exhaust is off.
  • Place a Foam Strip in the Flapper. ...
  • Weigh Down the Flap Disks. ...
  • Replace the Existing Gravity Damper. ...

How do you replace an exhaust fan motor?

To replace a vent fan using a fan motor replacement kit:

  • Turn off the power to the fan at the circuit breaker or fuse box.
  • Remove the cover on the vent fan.
  • Unplug the fan motor from the vent fan housing.
  • Unscrew the old fan motor from the housing, and take it out.

What to do if your exhaust hood is making noise?

solution: have your exhaust system checked by your mechanic or a muffler shop. the fix could be as easy as tightening a loose clamp or replacing a damaged rubber hanger. it’s also possible you might need to replace a section of rusted-out exhaust pipe or even the muffler. either way, it’s a quick and easy fix. don’t delay if you suspect the exhaust system is the problem — the consequences could be deadly if exhaust leaks into the interior while you are driving.

What happens if you don't run an exhaust fan in your bathroom?

What to look for when fan is not working?

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Why is my exhaust fan not working?

If the exhaust fan motor doesn't spin smoothly, you might need to clean the assembly or lubricate the motor with a few drops of light machine oil at each end of the motor shaft. The motor is burnt out and needs replacing.

How do you fix a noisy exhaust fan?

2:4311:55How To Fix a Noisy Bathroom Exhaust Fan | Easy Project - YouTubeYouTubeStart of suggested clipEnd of suggested clipJust apply pressure to both sides. And it's pretty easy to remove.MoreJust apply pressure to both sides. And it's pretty easy to remove.

Why is my bathroom exhaust fan not pulling air?

If they don't open easily or open only partly, airflow will be weak. Try moving the exterior damper by hand to make sure it opens easily. Clean away any debris that might hinder movement. Interior dampers rarely stick, but if you suspect trouble, remove the grille and push open the damper with a stiff wire.

How do you fix an exhaust fan flap?

0:554:30How to fix ceiling exhaust fan flap noise - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you will need to use a flat head screwdriver. And on the both side of the fan there is a clipMoreSo you will need to use a flat head screwdriver. And on the both side of the fan there is a clip that gets stuck with the fan. So just press the flat head screwdriver to unhook it.

Why is my exhaust fan noisy?

Overtime, dirt and grime build up on the fan blades can cause the fan to become noisy. Make sure that the fan blades are clean. If the fan is worn out or damaged, it may begin to make noise as it spins.

Why is my bathroom exhaust fan making so much noise?

Many noisy bathroom exhaust fans DO NOT NEED TO BE REPLACED… Most of the time the vent housing is simply full of dirt and dust. The dirt and dust accumulate over time and can cause the vent to make loud or vibrating noises.

Can exhaust fan be repaired?

Exhaust fan repairs will prevent mold growth in your house and keep the fan working for many more years. Chances are good that your broken fan doesn't need to be completely replaced. Mr. Electric repairs exhaust fans in kitchens and bathrooms every day.

How do you fix a bathroom exhaust fan?

1:024:45How to replace or repair a bathroom fan - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you're replacing the entire thing like me you need to remove the wiring. So that's behind here.MoreIf you're replacing the entire thing like me you need to remove the wiring. So that's behind here. Before you do this make sure the power is off turn it off at the breaker.

How do you know if your bathroom exhaust fan is clogged?

First, test your fan to see whether it has suction. Turn it on, then take a piece of printer paper and hold it in your palm, close to the fan. If your fan motor is operating properly, it will suck the paper up to the grill and hold it there. Second, with the fan on, go outdoors and take a look at the vent hood.

How do you lubricate an exhaust fan motor?

WD-40 is a good lubricant for exhaust fans because it will also help break up any remaining dirt, dust and grease, although you can also use other lubricants, such as silicone spray, to lubricate an exhaust fan. Use your hand to spin the fan blades a few times, and clean up any lubricant that drips down the motor.

How do I make my bathroom fan less noisy?

How to Fix a Noisy Bathroom FanThoroughly Clean Fan and All Moving Parts. ... Absorb the Sound With Sorbothane Rubber. ... Use Larger Duct. ... Straighten Out the Duct. ... Adjust the Housing or Fan Blades. ... Lubricate the Fan Motor and Blades. ... Tighten the Mounting Screws. ... Replace the Motor.More items...•

Can you lubricate a bathroom fan?

With the fan turned off, remove the fan cover, and vacuum out any dust or dirt that has become lodged in the fan. Lubricate the fan with silicone spray. Reattach the cover on the fan. If problems persist, buy and install a replacement unit.

How do you clean a noisy bathroom fan?

If your fan has been quiet and became noisy recently, the motor could be dirty. If there's dust, dirt and crud in the fan, use a can of compressed air to blow it out. Then, clean up any debris with a hand vacuum. That's pretty easy.

Commercial Exhaust Fan Repair

By listening for rattling or unusual tones you may be able to spot issues before the system fails. Excessive vibration or a velocity/pressure drop are another sign that something is not right. In any case, when the clattering or banging begins, it’s time to call in the experts.

Commercial Exhaust Fan Maintenance

All hoods should have preventive maintenance performed on a regular basis. These units are often overlooked even though they some of the most used pieces of equipment in many facilities.

Why Clean Commercial Exhaust Fans?

Aside from the obvious reasons, like ensuring proper operation and prolonging the equipment’s’ life, there is another reason. That is fire safety. If your exhaust fan is located in a cafeteria, kitchen, restaurant or catering facility, you need to have that hood cleaned regularly.

Preparing Commercial Exhaust Fans For Winter

For exhaust fans that are used to reduce heat, they are often not necessary in the cold winter months. When this is the case, you will want to winterize your exhaust fan. This often involves installing covers on the outside of the unit and installing foam on the inside.

We Can Help

We can repair all types and sizes of blowers, fans, and exhaust systems. Whether they are roof mounted fans, sidewall exhaust fans, or kitchen ventilation systems, we can help! Call us at 1-800-237-3141, email [email protected], chat with a support agent, or contact us online.

How long does it take to replace a bathroom vent fan motor?

You don’t have to cut into the ceiling, crawl around your attic or get up on your roof. It usually takes less than an hour.

How to find model number of fan?

Your first step is to get the fan’s model number. Remove the fan grille (Photo 1) and vacuum away the dust to find the number on a label or stamped on the fan’s housing. But don’t order a new motor until you remove the old one. You might need other parts too.

How to connect flexible duct to exhaust port?

Connect the flexible duct to the exhaust port with 1/2-in. sheet metal screws. If the port and duct aren’t the same size, use an elbow and reducer.

How to find the model number of a spherical grille?

Pull the grille down and pinch the springs to release them from the housing. Then vacuum out the dust so you can find the model number.

Can you replace a dead motor without tearing it out?

You can replace a dead motor without tearing out the ceiling and replacing the whole thing. You can also improve venting and prevent roof rot by running the vent through the roof, and not leave it in the attic as was done by many contractors. Both improvements are easy. This article shows you how. By the DIY experts of The Family Handyman Magazine.

Can you vent a bath fan into the attic?

If you don’t have a cap on your roof like the one shown in Photo 2, chances are your bath fan vents into the attic. Running a new duct up through the roof isn’t a complex job, but you will have to work in the attic and on the roof. Since you’re doing all that work anyway, consider replacing the fan.

How to fix fan that is sticking?

Turn the pin on the front of the fan with your hand to see if it rotates. Use your hand to try turning the pin in the middle of the fan. If it’s sticking or resisting, the pin probably just needs lubrication. Over time, the lubricant on the pin wears down as the fan blades rotate. Re-oiling the pin will usually solve this problem.

How to remove fan blades?

Turn the blades or washer in the center of the fan counterclockwise to remove them. Every fan is different, but the blades are either locked in place with a small washer on the pin or by the case of the pin itself. If there is plastic blocking the center of the blades, twist it counterclockwise until it comes loose and slide the blades off. If there is no washer, twist the base of the blades while holding the pin in place to loosen them off of the pin.

How to unscrew a fan pin?

With the pin exposed, there may still be 1-2 metal bolts locking the pin around the frame of the fan. Use a wrench to unscrew these pins and loosen them. You don’t need to remove the completely, but you do need to be able to get underneath them to reach all of the pin.

What is the pin on a fan?

If it loosens, unscrew it and set the front of the blade case down. The pin is the piece of metal in the center of the fan that the blades and case rotate around. The blade guard, or blade casing, refers to the plastic or metal case that keeps people from getting hurt by the blades.

Why does my fan blade stop spinning?

Over time, the lubricant on the pin wears down as the fan blades rotate. Re-oiling the pin will usually solve this problem. A dried out or sticky pin is one of the most common reasons for blades to stop spinning.

What is the latch on the side of a fan?

Depending on the model of your fan, there may be a latch on the side of the pin locking the blades into place. This latch usually slides back and forth to lock or unlock the blades.

Why is my fan not spinning?

Whether the blades aren’t spinning or the fan is making tons of noise, most issues with an electric fan are caused by poor lubrication or blockages in the vents. To solve most problems with an electric fan, disassemble the fan, lubricate the central pin and bearings, and clean out the vent and motor case. Repairing an electric fan can be tough if the problem has anything to do with the motor itself, which may be dead if the fan makes no noise when it’s turned on and the blades don’t turn at all after cleaning and oiling the pin. Since electric fans tend to be inexpensive, it’s usually not worth it to bother trying to repair the motor on your own and you should consider simply buying a new fan.

What happens if you don't run an exhaust fan in your bathroom?

An exhaust fan motor is something that you are going to have to keep up with. You will find that mold and mildew can begin to build up if the exhaust fan is not properly running in your bathroom. You will need to make sure that the design of your room is able to allow for the steam to go up into the fan. The repair on an exhaust fan motor is something that can be a hassle but it is something that you will need to do. Mold and mildew can be dangerous and has a distinct odor that can also create allergies.

What to look for when fan is not working?

You will need to take a good look at your fan before you decide what is wrong with it. Look for things such as loose wires that may simply need to be reconnected. You should also keep an eye out for any excessive dirt and debris that could cause the fan motor to stop working.

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Step 1 – Prepare

  • The first thing that you will need to do is get the electricity cut off in the bathroom. This is something that needs to be done before you even begin work on the fan. Even if you are not planning on working on the motor right away, you will need to still make sure that the electricity i…
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Step 2 – Remove Cover

  • Once you have the power turned off, you will need to get the cover removed. In order to do this, you will need to unscrew each of the screws with your screwdriver. Make sure that you set the screws aside and do not lose them. If the cover that you are removing has been painted over then you are going to need to get it loosened with a putty knife. You can also use your screwdriver fo…
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Step 3 – Inspect Fan

  • You will need to take a good look at your fan before you decide what is wrong with it. Look for things such as loose wires that may simply need to be reconnected. You should also keep an eye out for any excessive dirt and debris that could cause the fan motor to stop working.
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Step 5 – Replace Motor

  • You may need to take out the motor and bring it to your local hardware store to get a replacement. Make sure that you take it with you so that you are able to get the right model and size.
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