If you notice your ceiling fan run at a slower speed than usual, it could be a problem for different causes. There are some possible issues like a bad capacitor, lack of lubrication and maintenance, or winding damage. Wobbly is another factor that impacts speed. Besides, dust and dirt can slightly decrease ceiling fan speed.
However, in this article, we will discuss all the possible factors and their solution. Read this article and check one by one which issue decrees your fan speed.
Step 1: Check Lubrication.
Some old ceiling fan needs manual lubrication that has an oil reservoir that supplies oil to the bearing. How do you understand whether your ceiling fan needs oil or not? You can check the user manual to confirm its need or not. If you lost the manual or didn’t know your fan’s model, you can check it manually.
At the upper side of the motor housing, you will find a small hole that allows you to add oil manually. Typically, this small hole is marked as “add oil.” If you do not see these types of holes, your fan probably doesn’t need oiling. Most modern fans do not need oiling. They are permanent type bearing.
Check the reservoir by inserting a pipe. You can buy a ceiling fan oil checker. If you see the oil lever go down, add some oil slowly. Before adding oil, place some paper on the floor. You need to buy special types of motor oil that are made for ceiling fans. In the marker, you will find hunter ceiling fan oil, non-detergent oil made especially for ceiling fans.
First, add some oil into the hole, turn on the fan for 20 minutes, and then stop and recheck the level; if needed, add some oil until the hole overflow slightly. And then run the fan and see the speed is improved or not. If not, check the next step.
Step 2: Balance your ceiling fan.
This is the most common problem of a ceiling fan that impacts the airflow. You can easily catch this issue because if your fan is unbalanced, it creates wobbly. You should not ignore this part because it affects the airflow and also cleats annoying noise. But you don’t need to worry about falling off the fan because of just wobbly. A good firmly install fan will not fall ever. But a poor installation causes any unwanted accident.
You can quickly identify the imbalance blade by checking the distance from the ceiling to the end of the fan blades. If the ceiling is level, each blade tip should have the same distance from the ceiling. If there is a difference of more than 1/4 inches, the blades are not balanced.
Take a measurement tape and place it at the end of the blade to the ceiling. Keep a note of the distance of each blade and repeat the process. If there is a difference in the measurements, the bent blade must be repaired.
In the market, you will find a balancing kit that will be an easy solution. You can experiment with it by adding a balancing kit with each blade, running the fan, and observing which weight kit reduces misbalancing.
Step 3: Bad Capacitor.
The most common case for reducing ceiling fan speed is a bad capacitor. After a few years of use, a capacitor goes down. You will notice a significant speed drop. Ceiling fans are run in a single phase, and it depends on the capacitor to run or stop. Some fans have a capacitor that uses both a start and a stop, while others have separate capacitors. Also, multiple capacitors can be used for speed changing.
Turn off the power and open the fan canopy to remove the capacitor. First, you need to remove the capacitor. This is a small squire shape that rating microfarad. It can attach by screws or wire nuts. How will you be confirmed that it is a bad capacitor? To test, you need a millimeter and select “uf” and the two-point of the meter to the two ends of the capacitor. Suppose your capacitor rating is 420uf if you see the rating near the millimeter screen. That means your capacitor is ok. If you see a big difference, which indicated this is a bad capacitor.
In that case, you need to buy a similar capacitor. You can take a photo of your old capacitor, go to the local shop, buy a similar rating capacitor, and install it in your ceiling fan. After replacing, you will find a significant change in the speed of the fan.
Step 4: Damaged Winding.
After testing everything, if the speed will not improve, the motor winding goes damaged. You need to remove the fan completely to check for winding failures. Look for any heat discoloration or burn marks on the windings. You should go to the motor rewinding shop to check this part.
You can quickly identify the above problem. To identify lubrication issues, turn the fan by your hand, and if it is difficult to rotate and if it creates noise, this is the sign of lubrication. Any unusual buzzing indicates a faulty capacitor. A grinding or squealing noise means a problem with a bearing or bushing.