What is PCB: The Advantages of Using It in an AC, Benefits Explained

Learn about PCB and its advantages in air conditioning systems. Discover how this technology enhances efficiency and performance in modern AC units.
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3 min
March 31, 2026

What is a PCB in an air conditioner and how it works

A Printed Circuit Board or PCB serves as the central brain of your air conditioner, coordinating every internal function to maintain a perfect room temperature. This sophisticated electronic component processes signals from your remote control and thermal sensors to regulate the compressor speed and fan motor. If your current unit struggles with cooling, you can upgrade to a modern, energy-efficient model using the Insta EMI Card. This card provides a pre-approved card loan offer, allowing you to manage the purchase through Easy EMIs. It simplifies your shopping experience without depleting your savings.

Buying a new AC is now budget-friendly. Take a look at the selection of ACs on Bajaj Mall. Alternatively, visit any of Bajaj Finserv’s 1.5 lakh partner stores in 4,000 cities in India. Select the model that you like and get Easy EMI and zero down payment offers exclusively with Bajaj Finserv’s financing options. Check your loan eligibility and convert the cost of your new AC into Easy EMIs.


Also read: Beat the heat with these affordable air conditioner
 

How PCB Improves Air Conditioner Performance and Control

  • Enhanced control: PCBs provide accurate control over the AC's functions, including temperature, fan speed, and mode settings.
  • Energy efficiency: By optimising power usage, PCBs help reduce energy consumption, lowering electricity bills.
  • Reliability: PCBs increase the reliability of AC systems by ensuring stable and consistent operation.
  • Compact design: PCBs allow for more compact and streamlined AC unit designs, saving space.
  • Versatility: PCBs are used in various types of air conditioners, from window units to central systems.

You can also check out the Thomson air conditioners brand for more options.
 

Advantages of using PCBs in air conditioners

AdvantageDescription
Precision controlAllows for exact temperature and fan speed adjustments.
Energy efficiencyOptimises power usage, reducing energy consumption.
Enhanced durabilityImproves the lifespan and reliability of AC units.
Compact and versatileEnables sleek designs and use in various AC types.
Advanced functionalitySupports smart features and improved user interfaces.


Learn more about: portable AC prices.


Smart PCB technology and advanced cooling modes in modern ACs

Modern air conditioners feature smart PCB technology that adjusts cooling based on the number of people in a room. These advanced boards support multiple cooling modes to reduce electricity consumption while maintaining comfort. You can upgrade to a high-end inverter air conditioner using your Insta EMI Card to manage the cost effectively. The Insta EMI Card offers a pre-approved card loan offer that allows you to pay in Easy EMIs. This makes it simple to invest in superior technology without straining your monthly budget or savings.
 

5 signs that your air conditioner PCB may be faulty

A faulty PCB causes your air conditioner to behave erratically or stop working entirely. Identifying these signs early helps you avoid expensive repairs and ensures your home stays cool during summer.

  • The indoor unit displays an error code that indicates a communication failure between components.
  • Your air conditioner does not respond to commands from the remote control or manual buttons.
  • The appliance turns off unexpectedly or restarts repeatedly without reaching the set temperature.
  • You notice a burning smell or visible scorch marks on the electronic control panel.
  • The outdoor compressor fails to start even though the indoor fan is running at full speed.
     

Financing options with Bajaj Finserv

Explore a diverse range of air conditioner models on Bajaj Mall. Once you have made your choice, visit any Bajaj Finserv partner store to select the model that fits your needs. Simplify your purchase with the Bajaj Finserv EMI Network Card, which provides a pre-approved limit and flexible repayment options, allowing you to enjoy interest-free EMIs.
 

Advantages of using the Bajaj Finserv EMI Network Card:

  • Competitive pricing: Bajaj Finserv promises that your investment in an air conditioner is cost-effective with competitive pricing.
  • No Cost EMIs: The ease of buying your desired air conditioner is enhanced with the option of interest-free EMIs with Bajaj Finserv EMI Network Card.
  • Zero down payment: Get rid of upfront costs on select models thanks to the zero down payment option.
  • Wide availability: Take advantage of an extensive range of products through the Bajaj Finserv EMI Network, available across numerous cities.
  • Exclusive offers: Avail special deals and cashback offers when purchasing with the Bajaj Finserv EMI Network Card.
     

Bajaj Finserv app for all your financial needs and goals

Trusted by 50 million+ customers in India, Bajaj Finserv App is a one-stop solution for all your financial needs and goals.

You can use the Bajaj Finserv App to:

  • Apply for loans online, such as Instant Personal Loan, Home Loan, Business Loan, Gold Loan, and more.
  • Invest in fixed deposits and mutual funds on the app.
  • Choose from multiple insurance for your health, motor and even pocket insurance, from various insurance providers.
  • Pay and manage your bills and recharges using the BBPS platform. Use Bajaj Pay and Bajaj Wallet for quick and simple money transfers and transactions.
  • Apply for Insta EMI Card and get a pre-qualified limit on the app. Explore over 1 million products on the app that can be purchased from a partner store on Easy EMIs.
  • Shop from over 100+ brand partners that offer a diverse range of products and services.
  • Use specialised tools like EMI calculators, SIP Calculators
  • Check your credit score, download loan statements and even get quick customer support—all on the app.

Download the Bajaj Finserv App today and experience the convenience of managing your finances on one app.

Do more with the Bajaj Finserv App!

UPI, Wallet, Loans, Investments, Cards, Shopping and more

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Disclaimer

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For customer support, call Personal Loan IVR: 7757 000 000

Frequently asked questions

Can I buy a new AC on EMIs?

Yes, you can easily purchase a new air conditioner with Bajaj Finserv's Easy EMI options. Whether you already have the EMI Network Card or are new to it, here is how you can get started:
If you have the Bajaj Finserv EMI Network Card:

  • Explore ACs on Bajaj Mall: Choose from top brands offering models with fast cooling, energy efficiency, and advanced climate control.
  • Visit a partner store: Check out the latest ACs in person at any of 1.5 lakh partner stores across 4,000 cities.
  • Use your EMI Network Card at checkout: Convert the total cost into Easy EMIs that fit your monthly budget.
  • Zero down payment on select models: Bring home your air conditioner without paying anything upfront.

If you do not have an EMI Network Card:

Check your Insta EMI Card eligibility online using your mobile number and OTP. If eligible, you can apply instantly and start shopping for your favourite AC easily and affordably.

What are the benefits of PCB in AC systems?

PCBs in AC systems provide numerous benefits, including enhanced control over temperature and fan speed, improved energy efficiency, and greater reliability. They enable compact and versatile designs, making air conditioners more adaptable to different spaces. Additionally, PCBs support advanced features like smart connectivity, enhancing user convenience and functionality.

How long can a PCB in an AC last?
A PCB in an AC system can typically last between 7 to 10 years, depending on factors like usage, environmental conditions, and maintenance practices. Regular care, such as avoiding exposure to moisture and dust, can extend the lifespan of the PCB, ensuring the air conditioner operates efficiently over time.
What is a PCB in an air conditioner and what does it do?

A PCB is the central control unit of your air conditioner. It acts as a communication hub between the sensors, compressor, and motors. The board interprets your temperature settings and coordinates the operation of every internal part to ensure the machine cools your room consistently and safely.

Why is PCB important for air conditioner operation?

The PCB is vital because it manages the logic of the entire cooling system. Without this component, the air conditioner cannot regulate the compressor or the fan. It ensures that the appliance operates within safe electrical limits and maintains the specific climate conditions you choose for your living space.

How does PCB control cooling function in modern AC units?

Modern PCBs use sophisticated algorithms to adjust cooling power. The board monitors data from thermal sensors and modifies the compressor speed accordingly. This precise control allows the unit to maintain a steady temperature, which prevents the sudden blasts of cold air or warm spells common in older models.

What is the function of the PCB in an inverter air conditioner?

In an inverter air conditioner, the PCB converts incoming power to a variable frequency. This allows the compressor to run at different speeds rather than just turning on or off. This continuous adjustment saves significant energy and provides a much quieter operation compared to non-inverter cooling systems.

Why do air conditioner PCBs fail during voltage fluctuations?

Voltage fluctuations cause excessive heat or electrical stress on the delicate circuits of the PCB. Since these boards contain sensitive microchips and capacitors, sudden changes in the power supply can blow a fuse or melt the copper tracks. This leads to a total failure of the control system.

How can voltage spikes damage an air conditioner PCB?

A voltage spike sends a high surge of electricity through the board in a fraction of a second. This surge overwhelms the protective components and destroys the electronic pathways. Such damage usually requires a full replacement of the board, as the high voltage often fries the central processor.

Can an air conditioner run properly without a PCB board?

No, an air conditioner cannot function at all without a PCB. Every modern cooling system relies on electronic logic to manage its operations. Without the board, there is no way to start the motor, engage the cooling cycle, or even receive a signal from the remote control unit.

How does a smart PCB enable advanced cooling modes?

A smart PCB connects to various sensors and sometimes to the internet via Wi-Fi. It uses this connectivity to run specialised modes like "Eco" or "Turbo." The board calculates the most efficient way to achieve your requested temperature by balancing fan speed and compressor output in real-time.

What are common signs of a faulty PCB in an AC?

Common signs include the unit failing to power on or displaying persistent error codes. You might also notice that the fan runs but the air is not cold. Sometimes, the unit makes clicking sounds as the faulty PCB struggles to engage the relay for the outdoor compressor unit.

Is repairing an AC PCB possible or is a replacement required?

Technicians can sometimes repair minor issues like a blown fuse or a faulty capacitor on the board. however, if the main microchip or the circuit paths suffer extensive damage from a power surge, you must replace the entire PCB. Replacement ensures the long-term reliability and safety of your appliance.

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