Is Your Car AC Not Cooling? Here’s What Might Be Wrong

Ever turned on your car AC and still felt the heat? You’re not alone. In Dhaka’s scorching weather, a cooling system that doesn’t work properly can turn every drive into a sweaty nightmare. You’re stuck in traffic, the sun’s beating down, and instead of cold air, all you get is warm disappointment.

We’ve seen this problem too many times. As car importers and service experts at Biswas Automobiles, we knew drivers needed more than just basic repairs. They needed trained mechanics, proper diagnostics, and genuine parts—all under one roof. That’s exactly what we offer.

Let me walk you through the most common reasons your car AC isn’t cooling—and how our team can fix it the right way.

Why Your Car AC Is Not Cooling Properly

Your car’s air conditioner is more than just a comfort feature—especially in Dhaka’s heat, it’s a necessity. But when your car AC won’t get cold, the cause is usually more than just “bad luck.” AC systems have multiple parts that need to work together. If even one fails, it can stop cold air from reaching your cabin. Let me explain the most common reasons why car AC is not cooling and how we fix each issue at Biswas Automobiles.

01. Low Refrigerant or AC Gas Leak

Low refrigerant is the number one reason for car AC not cooling. The refrigerant (or AC gas) absorbs heat from the cabin and pushes it outside. If it leaks, your system can’t cool the air—no matter how high you turn the fan.

You might notice the AC running but the air staying warm. Another sign is a hissing sound from under the hood. Leaks can happen from old hoses, seals, or loose connections.

At Biswas Automobiles, we start by using leak detectors and UV dye to trace any hidden refrigerant loss. Once found, we seal the leak and recharge your system with manufacturer-approved refrigerant. If you’ve been searching for a car AC repair service in Dhaka, we make sure your gas refill is clean, accurate, and long-lasting.

02. Faulty AC Compressor

The AC compressor is the heart of the system. It pressurizes the refrigerant and circulates it through the system. When it fails, your auto air conditioner stops cooling completely.

A faulty compressor can show up as clicking noises, high engine strain when the AC is on, or no cold air at all. Another clear sign is when the AC clutch doesn’t engage, even after turning the AC on.

We use proper diagnostic tools to check the compressor’s condition. If it’s repairable, we fix it on-site. If it’s completely dead, we replace it with a genuine part based on your car’s make and model. Whether your car AC isn’t cold or not working at all, our experienced technicians handle it with precision.

03. Clogged Cabin Air Filter

If your car air conditioning is not very cold, but everything else seems fine, the problem might be as simple as a dirty cabin air filter.

The cabin filter traps dust, pollen, and pollution. But when it gets clogged, it restricts airflow. That means your AC might still be cooling the air, but not enough of it is reaching you. You might feel weak airflow or hear the fan running harder than usual.

We check the cabin filter during every car AC service. If it’s dirty, we clean or replace it with a high-quality filter. A fresh filter helps your AC cool faster, improves air quality, and reduces pressure on the blower motor. For drivers in Dhaka, especially during the dust-heavy dry season, replacing this filter regularly is a must.

04. Broken or Blocked Condenser

If your car AC is not blowing cold air, a damaged or clogged condenser might be the issue. The condenser’s job is to remove heat from the refrigerant. If it can’t do that, the air inside the car stays warm.

Common signs include warm air at all fan speeds, especially when the car is idle. Dirt, leaves, or even a small road stone can block or damage the condenser coils. Overheating engines may also affect the condenser’s ability to cool.

At Biswas Automobiles, we perform visual and pressure tests to see if the condenser is blocked or leaking. We clean it thoroughly using safe, non-corrosive cleaners. If it’s broken, we replace it with a compatible OE-grade part. We restore your AC’s cooling power while also protecting the engine from overheating due to cooling system failures.

05. Electrical or Sensor Failure

Your car’s AC system relies on a network of sensors, relays, and fuses to function correctly. If any of these fail, you might find the auto AC not cooling or turning off randomly.

One common issue is a blown fuse or a shorted wire. Another is a malfunctioning temperature sensor, which prevents the system from adjusting air output. If your car AC isn’t cold, even with no visible leak or compressor problem, the issue is likely electrical.

We use a diagnostic scanner to read fault codes from your car’s onboard system. From there, we trace the issue to a specific sensor or relay. Electrical issues require precision, and that’s where our hybrid-trained mechanics shine. Whether it’s a basic sedan or a luxury EV, we fix the root cause quickly and safely.

06. Blower Motor Not Working

If your aircon is not cooling the car, but the AC system is full and functioning, your blower motor might be the reason. This part is responsible for pushing the cooled air into the cabin.

Signs of a failing blower motor include no air coming from the vents, weak airflow at all speeds, or strange noises when turning on the AC. Sometimes, it may work intermittently before stopping entirely.

Our team checks the motor, blower resistor, and related wiring. If the motor is failing, we replace it with an OEM-spec unit. If the resistor or switch is faulty, we repair or replace those instead. This ensures that your car AC won’t get cold issue doesn’t come back after a short fix.

07. AC System Needs Recharge

Even with no visible leaks, your car AC system might slowly lose refrigerant over time. If your car AC is not cooling properly, a simple recharge might bring it back to life.

AC systems are sealed, but not always perfectly. Over years, refrigerant can seep out through microscopic leaks. As the levels drop, the air gets warmer, especially during long drives or idling.

We measure the exact pressure in your AC lines and compare it to the manufacturer’s specs. If it’s low, we remove any old gas, vacuum the system to remove moisture, and refill it with high-quality refrigerant. It’s a quick, effective solution when there’s no major component failure. Regular recharge every few years is the key to a cold, reliable AC in Bangladesh’s heat.

How We Troubleshoot Car AC Problems at Biswas Automobiles

At Biswas Automobiles, we follow a proven process to diagnose and fix car AC problems with precision. When your car AC isn’t cooling, we don’t guess—we test every component with the right tools.

Step 1: Visual Inspection
We start by checking for obvious signs of trouble—leaks, damaged hoses, or worn-out belts. Our team also checks the AC clutch, fan operation, and overall system cleanliness.

Step 2: Pressure Testing & Leak Detection
Using AC manifold gauges, we measure the pressure levels to see if the system is undercharged or overcharged. If we suspect a refrigerant leak, we use a gas leak detector and UV dye to find even the smallest cracks in pipes or joints.

Step 3: Electrical & Sensor Diagnostics
If mechanical parts are working fine, we plug in our OEM-grade diagnostic scanners. This helps us find faults in sensors, relays, fuses, or blower motors—especially in modern cars with complex AC control systems.

Step 4: Targeted Repairs
Once the issue is confirmed, we repair or replace only what’s needed—no upselling, no shortcuts. We use genuine parts and refrigerants to make sure your car AC runs like new.

We service all major brands, including Toyota, Honda, BMW, Mercedes-Benz, Mitsubishi, and Nissan. Whether it’s a hybrid, a luxury sedan, or an SUV, we handle each vehicle with the same care and expertise.

What to Do When Car AC Is Not Cooling

If your car AC is not cooling properly, don’t panic. First, switch off the AC for a few minutes and let the system rest. Check if the fan is blowing air. If it isn’t, you may have an electrical issue. If it is, but the air is still warm, avoid long idling or heavy traffic until you get it checked. Driving in extreme heat with a weak AC can overwork the system and lead to bigger problems.

Avoid DIY guesswork. Let a trusted car AC repair service handle it. Modern AC systems are complex and need proper tools and trained hands to fix them right.

At Biswas Automobiles, we offer expert diagnosis, genuine parts, and reliable service—all under one roof. Call us at +8801742700300 or book a full AC inspection today. We’re here to keep your ride cool and comfortable, no matter the weather.

Why Dhaka Drivers Trust Biswas Automobiles for Car AC Repair

At Biswas Automobiles, we’ve spent the last 9+ years building a reputation as one of Dhaka’s most trusted names in car AC repair service. Our team includes certified mechanics, including specialists trained in hybrid and electric vehicles. Whether it’s a routine gas refill or a full AC system overhaul, we handle every job with skill and care.

We know how inconvenient breakdowns can be. That’s why we offer 24/7 customer support, along with home service and car towing options if you can’t make it to our workshop. Every step of our service is designed for your comfort and peace of mind.

Our workshop is equipped with German diagnostic and AC service tools, along with a state-of-the-art paint booth for those needing bodywork. We use only genuine refrigerants and OEM-approved parts to ensure long-lasting results.

Most importantly, we treat every car like our own. From luxury sedans to family hatchbacks, we give each vehicle the same attention to detail. If your car AC is not blowing cold air, we’re ready to fix it right—the first time.

Book a Car AC Service in Dhaka Today

Spending hours in traffic without AC isn’t worth it—especially when help is just a call away. If your car AC isn’t cooling, let our expert team take care of it fast and right.

Call +8801742700300 or visit our service center at Ka-60, Soudi Mosjid Road, Nodda, Dhaka.

You can also reach us through WhatsApp or Facebook Messenger for quick bookings and support.

Don’t wait until it gets worse—schedule your car AC service today and stay cool on the road.