Published Jun 25, 2025 3 min read

What is a fan capacitor- Introduction

Have you ever noticed your ceiling fan spinning slowly or not starting at all? It could be due to a small but important part inside—called a fan capacitor. This tiny device helps your fan start smoothly and run at the right speed. Whether you live in a city apartment, a hostel room, or a large home, fans are a must-have in every space, especially during hot weather. And when they stop working properly, comfort takes a hit. A fan capacitor plays a big role in making sure your fan runs efficiently and uses less electricity. In fact, most fan issues happen because of a faulty capacitor.

If you are planning to buy a smart fan, a quality capacitor is a must-have for top performance.

Planning to buy a new fan without spending a large amount at once? Bajaj Finserv makes it simple. You can walk into any of their 1.5 lakh partner stores across 4,000 cities in India and pick the fan model you like. Use Bajaj Finserv’s financing options to pay in Easy EMIs that fit your monthly budget. On select models, you can even enjoy zero down payment—so you can take the fan home without paying anything upfront. 

You can also check your loan eligibility online in just a few minutes and shop with confidence.

Why is a capacitor used in a ceiling fan

A capacitor is used in a ceiling fan to help the motor start and run efficiently. Without it, the fan would not be able to rotate smoothly or even turn on in many cases. The capacitor gives the fan motor the initial push it needs and helps maintain a steady speed afterward. It also reduces noise and power consumption, making the fan more reliable and energy-efficient. This is especially helpful during hot summer months when fans are used for long hours. 

When you are looking for a durable and high-performance option, consider bringing home a Bajaj fan that uses high-quality capacitors for smooth and efficient cooling.

Types and uses of fan capacitors

Fan capacitors come in different types, each designed to help the fan motor work better. Some help start the fan, while others keep it running smoothly. Knowing about the types of capacitors can help you choose or replace the right one, whether you are fixing your ceiling fan or buying a new model.

  • Start capacitor: This type gives the fan motor an extra push to start spinning. It is important when your fan struggles to start or takes time to get going.

  • Run capacitor: A run capacitor helps the fan maintain a steady speed. It also improves energy efficiency and reduces noise during regular use.

  • Dry capacitor: This is a smaller capacitor, commonly found in low-power fans like a table fan. It is light, compact, and suitable for short usage periods.

  • Oil-filled capacitor: These are stronger and last longer. They are ideal for larger fans that run for long hours, such as ceiling fans in big rooms or commercial spaces.

Capacitor for a fan- Facts and information

A fan capacitor may be small, but it has a major role in how well your fan performs. From smooth start-up to stable airflow, the capacitor keeps your fan working reliably. Whether you are repairing a basic fan or buying a new model with modern features, it helps to know a few important facts.

Here are some useful points to remember:

  • A faulty capacitor is one of the most common reasons for a fan not starting or spinning slowly.
  • Capacitors are rated in microfarads (µF), and the right rating ensures proper fan speed and performance.
  • Ceiling fans usually use capacitors ranging from 1.5 µF to 4 µF.
  • Fans with higher speeds or advanced features may require dual capacitors.
  • A stylish designer ceiling fan often includes quality capacitors to support smart functions and silent operation.

Symptoms of a faulty fan capacitor

When a fan capacitor starts to fail, your fan shows clear signs that something is wrong. These symptoms can affect how well your fan cools the room, how much energy it uses, and even how long it lasts. Knowing these signs early can help you take quick action.

Look out for these common symptoms:

  • Slow fan speed: If your fan spins much slower than usual, the capacitor may not be working properly.
  • Fan does not start: When you turn on the fan but the blades do not move, the capacitor may have failed completely.
  • Humming sound: A low humming noise from the fan motor could mean the capacitor is struggling to power it.
  • Overheating: A faulty capacitor can cause the motor to heat up faster than normal.
  • Inconsistent performance: If the fan sometimes works fine and sometimes does not, the capacitor may be weakening.

These signs apply to all types of fans, whether it is a ceiling fan or a remote table fan.

Conclusion

A fan capacitor may not be visible, but it is one of the most important parts of your fan. It ensures your fan starts on time, runs smoothly, and delivers consistent airflow. Whether you are fixing an old fan or planning to upgrade to a modern one, understanding how capacitors work can help you make a smart choice.

If your fan shows signs like slow speed, strange sounds, or delayed start, replacing the capacitor could restore its performance. When upgrading to a new model, such as a stylish ceiling fan or a remote-controlled fan, make sure it comes with a reliable capacitor.

To enjoy better comfort at home, you can now explore the latest offers on electronics and home appliances, including fans, to find the best deals.

Buy your fan on Easy EMIs with Bajaj Finserv

Buying a new fan does not have to stretch your budget. With Bajaj Finserv, you can split the total cost into Easy EMIs and avoid paying the full amount at once. Select fan models are also available with zero down payment, making upgrades even more affordable. Check your pre-approved loan limit online and visit the nearest Bajaj Finserv partner store. Pick your fan and choose a repayment plan that fits your budget. 

Visit your nearest Bajaj Finserv partner store to browse through a wide selection of products. Choose the fan or any other appliance that matches your needs. Convert the total cost into Easy EMIs and enjoy a repayment period of up to 60 months. Bajaj Finserv offers this flexible financing option on over 1 million products.

Benefits of shopping with Bajaj Finserv

  • Competitive prices: Get the best deals on fans from trusted brands at Bajaj Finserv partner stores, combining quality with affordability.
  • Easy EMIs: Convert your fan purchase into simple monthly EMIs that suit your financial plans without added stress.
  • Zero downpayment offers: Take home select fans without any upfront payment, ideal for hassle-free and budget-friendly shopping.
  • Wide accessibility: Access a wide network of partner stores across India, making it easy to find the fan you want near you.
  • Free home delivery: Enjoy free delivery on select fan models, ensuring your purchase reaches your doorstep quickly and conveniently.

Frequently asked questions

Can I get a fan on EMI?

Yes, you can purchase a fan with Bajaj Finserv's Easy EMI options.  

 

If you are an existing user of the Bajaj Finserv EMI Network Card:  

  • Explore a wide range of fans on Bajaj Mall.
  • Choose the preferred model and visit a Bajaj Finserv partner store to check it out in person.
  • Use your EMI Network Card and avail of Easy EMIs for affordable monthly payments.
  • Enjoy your new fan on Easy EMIs.
     

If you do not have a Bajaj Finserv EMI Network Card, start by checking your EMI eligibility and take the first step towards enjoying the affordability and convenience of Easy EMIs.

What happens if the capacitor fails in the fan?

If the fan capacitor fails, the fan may not start or will run at very low speed. It may also make humming noises and overheat. The motor struggles to receive the required push to operate, affecting overall performance and airflow.

What causes a capacitor to fail?

A fan capacitor may fail due to overheating, voltage fluctuations, ageing, or prolonged use. Environmental factors like humidity, dust, and poor-quality components can also reduce its lifespan. Electrical stress and poor ventilation further increase the risk of failure over time.

Is a fan capacitor useful as a battery substitute?

No, a fan capacitor is not a substitute for a battery. Capacitors store energy temporarily and release it quickly to help start and run motors. Batteries provide a steady power supply over time, which capacitors cannot do. Their functions are very different.

Is fan capacitor AC or DC?

A fan capacitor is designed to work in AC (alternating current) circuits. Ceiling fans and most household fans run on AC power, and their capacitors are built to support AC motors by improving phase shift and ensuring smooth startup and speed control.

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