Why is my exhaust fan running slow?

Asked By: Bran Cohn | Last Updated: 26th March, 2020
Category: home and garden home appliances
4.7/5 (3,646 Views . 39 Votes)
The torque to drive the motor of your electric fan comes from the magnetic field induced in the motor coils when electricity passes through the coils. When the fan slows down and stops, it could simply be because the coils are worn out, but it's often a burned-out capacitor.

Click to see full answer


Simply so, why does my fan keep slowing down?

The torque to drive the motor of your electric fan comes from the magnetic field induced in the motor coils when electricity passes through the coils. When the fan slows down and stops, it could simply be because the coils are worn out, but it's often a burned-out capacitor.

Additionally, why does a fan stop working? If your ceiling fan stopped working or is not turning on, it could be because it isn't receiving any electricity. This could be because the circuit breaker has tripped or is off. Check your panel to confirm this. If the circuit breaker works fine, it could be a problem with loose wiring and connections.

Similarly, you may ask, how can I make my fan faster?

Click the up arrow next to the "CPU" label at the bottom of the SpeedFan screen. The percentage displayed is the speed at which your fan is operating; for instance, when starting the application, your fan might be running at 85 percent. By clicking the up arrow, you'll increase the fan's speed.

How do I fix my electric fan from overheating?

  1. Remove front grill and remove the blades.
  2. Remove the screws carefully.
  3. Remove the motor cover.
  4. Check if the motor has accumulated dust. The dust can make your fan drag endlessly and thus get overheated.
  5. Brush out the dust. Take care not to damage any connections and cables while you are at it.

24 Related Question Answers Found

What happens if fan capacitor fails?

However, two things happen in case a fan capacitors fails, or is not connected. Speed of this rotation will be quite slow, as in the absence of capacitor, it will not get required running torque. The running winding is likely to get damaged soon due to heavy current.

Do you need an electrician to replace a bathroom fan?

If you hire an electrician, you may also need to hire someone –- a handyman, perhaps -- to patch drywall or do other finishing work. Installing a bathroom exhaust fan usually takes three to four hours, and costs between $165 and $350.

How do you clean exhaust fans?

Prepare a mix of water and soap or you can also add a mixture of 1/4 ammonia, 2 tbsp baking soda and 1 cup full of warm water. Put on the rubber gloves and, using the above mixture and cotton cloth, scrub the exhaust fan blades and then the rest of the body.

How do you troubleshoot a bathroom exhaust fan?

Troubleshooting Your Bathroom Exhaust Fan
  1. Check if the exhaust duct is connected to the fan; it could be disconnected.
  2. Check the flapper in the exhaust vent hood; it could be jammed.
  3. Check if your fan is actually a recirculating fan, which filters out odors instead of removing moisture.

How do I test my bathroom exhaust fan?


A simple way to test your fan's suction is to take a single square of toilet paper and place it along the fan vent while the fan is running. If the fan holds up the toilet paper, then the fan is working properly.

What causes a bathroom exhaust fan to stop working?

A fan is essentially an electric motor with a propeller or drum-like blades. When bath and range-hood fans stop working, the problem is usually one of two things: the fan isn't receiving power or the motor has burned out. If it's dead to the world, check the circuit breaker that serves the fan.

How do I fix my exhaust fan motor?

How to Repair an Exhaust Fan Motor
  1. Step 1 – Prepare. The first thing that you will need to do is get the electricity cut off in the bathroom.
  2. Step 2 – Remove Cover. Once you have the power turned off, you will need to get the cover removed.
  3. Step 3 – Inspect Fan.
  4. Step 4 – Pull out Exhaust Fan.
  5. Step 5 – Replace Motor.

How do you clean a bathroom exhaust fan?

The most efficient tips on how to clean a bathroom exhaust fan.
  1. Clean the Vent Cover with Soapy Water. Cleaning the cover is simple.
  2. Use a Vacuum to Get Rid of Dust on the Exhaust Fan. Before you touch the exhaust fan, unplug the standard two-prong plug that powers the fan.
  3. Remove Grime with a Damp Cloth.

Does capacitor increase fan speed?

Now, when you increase the capacitance, the voltage across the capacitor decreases but that across the fan motor increases. Accordingly, the speed of the fan increases. In other words, you need to increase the capacitor value to increase the fan speed.

Can you adjust ceiling fan speed?


High, medium, and low.
If the fan is off, pulling the chain will set the fan in HIGH speed. The second pull will set the fan in MEDIUM speed. The third pull will set the fan in LOW speed. This chain should be the one that controls the ceiling fan.

What is the use of capacitor in fan?

So in general capacitor is used for p4oviding starting torque or starting rotation to single phase motor., because for rotation any equipment in magnetic field we require phase difference but in single phase motor only one phase use so we connect capacitor in starting winding by this phase difference generate and our