Air conditioners have become an essential appliance in Indian homes, especially during intense summer months in cities like Mumbai, Delhi, Hyderabad, and Chennai. An AC that suddenly stops switching on can disrupt comfort, affect sleep quality, and make indoor spaces uncomfortable during high temperatures. In many cases, the issue may be linked to power supply problems, thermostat settings, clogged filters, or internal electrical faults. Understanding these common reasons helps users identify whether the problem can be fixed at home or requires professional servicing. Proper troubleshooting also helps avoid unnecessary repair expenses and extends the lifespan of the appliance. If you are having issues related to cooling, check why is AC not cooling.
15 Reasons Why Your AC Won’t Switch On? Simple Troubleshooting and Expert Solutions (2026)
This smart cooling guide helps you fix why your AC will not start, with simple tips. Get your AC on Easy EMIs from Bajaj Finserv.
You can get a range of air conditioners on Easy EMIs. Check your loan eligibility in just a few clicks.
Why is your AC not switching on?
Common reasons why your AC will not switch on
AC startup problems can result from simple issues such as power supply faults, dirty filters, or thermostat settings. Regular maintenance and timely servicing help prevent sudden breakdowns during Indian summers. When repairs become frequent, upgrading to a modern energy-efficient AC may be the better long-term solution.
| Issue | Cause | Fix |
|---|---|---|
| AC not receiving power | Loose plug, tripped breaker, damaged socket, or voltage fluctuation | Check plug connections, power supply, stabiliser, and reset the circuit breaker |
| Remote not working | Weak batteries, blocked sensor, or damaged remote buttons | Replace batteries, clean sensor area, and test manual operation |
| Dirty air filters | Dust buildup restricting airflow and causing overheating | Clean filters regularly and ensure proper airflow circulation |
| Incorrect thermostat setting | Wrong mode selection or temperature setting | Set cooling mode and reduce temperature below room level |
| Compressor overheating | Continuous operation during extreme heat | Switch off the AC temporarily and improve outdoor ventilation |
| Capacitor failure | Damaged capacitor preventing compressor startup | Contact a technician for capacitor inspection and replacement |
| Stabiliser malfunction | Faulty stabiliser or unstable voltage supply | Check stabiliser compatibility and replace damaged units |
| Low refrigerant levels | Refrigerant leakage or insufficient gas | Schedule professional inspection and refrigerant refill |
| Drainage blockage | Blocked drain pipe causing water accumulation | Clean drainage pipes and remove water blockage |
| Sensor malfunction | Faulty temperature sensor affecting cooling cycles | Restart the AC and seek technician support if issue continues |
| Fan motor issue | Damaged indoor or outdoor fan motor | Check airflow performance and arrange servicing if required |
| Overload protection triggered | System overheating or electrical overload | Allow cooling time before restarting the AC |
| Incorrect installation | Improper wiring or airflow setup | Ensure installation is handled by trained professionals |
| PCB or wiring fault | Internal electrical communication issue | Contact authorised service technicians for inspection |
| Old AC system | Ageing components and repeated wear | Consider upgrading to a newer inverter AC model |
Signs you need a professional AC technician
Some AC problems cannot be resolved through basic troubleshooting and may indicate deeper electrical or mechanical faults. Ignoring these warning signs can increase repair costs, reduce cooling efficiency, and shorten the appliance lifespan.
• AC repeatedly switches off: Frequent automatic shutdowns may indicate compressor, sensor, or electrical problems requiring professional diagnosis
• Burning smell or unusual odour: Electrical burning smells can signal wiring damage or overheating components that need immediate attention
• Water leakage from the indoor unit: Continuous leakage may result from blocked drainage systems or internal component failure
• Unusual noises during operation: Clicking, buzzing, or grinding sounds often indicate fan motor, capacitor, or compressor issues
• Poor or no cooling performance: Low refrigerant levels, compressor faults, or airflow blockage can reduce cooling efficiency significantly
• Circuit breaker trips repeatedly: Electrical overload or short-circuit problems should always be inspected by trained technicians
• Ice formation on AC components: Frozen coils may indicate airflow restrictions or refrigerant-related issues requiring servicing
• Remote and manual controls both fail: Internal PCB or electrical communication faults may stop the AC from responding completely
Follow the AC Maintenance Guide to understand when professional servicing becomes essential.
Get electronics and appliances on Easy EMIs with Bajaj Finserv
Upgrading your home with the latest electronics and appliances is now easier and more affordable with Bajaj Finserv’s flexible financing options. Follow these steps to get started:
- Explore products on Bajaj Mall: Browse a wide range of electronics and appliances from trusted brands. Compare features like energy ratings, storage capacity, performance settings, and design to choose the right product for your home.
- Visit a partner store: Once you shortlist a model, step into any of Bajaj Finserv’s 1.5 lakh partner stores across 4,000 cities in India. See the product in person, talk to experts, and make a confident decision.
- Choose the Easy EMI Loan option: At checkout, select the Bajaj Finserv Easy EMI Loan. Avail financing of up to Rs. 5 lakh and split the cost into convenient monthly instalments. Some products also come with a zero down payment option.
- Check your loan eligibility online: Plan better by checking your loan eligibility in minutes. Simply enter your mobile number and OTP to know your pre-approved limit.
- Use the EMI Network Card for purchases up to Rs. 3 lakh: Already own the Bajaj Finserv EMI Network Card? Use it for instant, paperless checkout and convert your purchases of up to Rs. 3 lakh into Easy EMIs.
Frequently asked questions
Yes, you can easily bring home your preferred AC using Bajaj Finserv’s Easy EMI options. Whether you already have the EMI Network Card or are new to it, here is how to begin:
If you have the Bajaj Finserv EMI Network Card:
- Explore ACs on Bajaj Mall: Choose from a wide range of air conditioners across top brands, capacities, and energy ratings.
- Visit a partner store: Check out the product in person at any of Bajaj Finserv’s 1.5 lakh partner stores across 4,000 cities in India.
- Use your EMI Network Card at checkout: Convert the cost into Easy EMIs that fit your monthly budget.
- Zero down payment on select models: Take your chosen AC home 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, apply instantly and enjoy a smarter, more affordable way to buy your preferred AC on Easy EMIs.
Your AC may not turn on due to power issues, thermostat faults, or internal component failures. Check the circuit breaker, batteries, and settings first. If the problem continues, it could involve wiring, sensors, or compressor-related faults.
Common causes include a tripped breaker, clogged filters, faulty thermostat, or damaged capacitor. These issues interrupt power or airflow, preventing startup. Identifying the root cause early helps avoid further damage and ensures smoother operation.
Start by resetting the thermostat, checking power supply, and switching the unit off and on after a few minutes. If it still does not start, avoid forcing it repeatedly, as this may worsen underlying electrical or mechanical issues.
Check basic issues like power supply, thermostat settings, and air filters. Clean or replace filters if needed and reset the breaker. If the AC still does not start, professional inspection is recommended to diagnose internal faults.
The reset button is usually found on the outdoor unit, near the compressor, or sometimes on the indoor unit panel. It is typically small and red. Refer to the user manual for the exact location in your AC model.
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