Why Is My AC Not Cooling Properly? 8 Real Reasons & Fixes in Dhaka
📋 What You’ll Learn
Most homeowners and office managers in Dhaka assume their AC is fine as long as it turns on. But “turns on” and “cools properly” are two very different things. When an AC runs continuously without reaching the set temperature, your electricity bill shoots up while comfort stays low. That’s a double loss.
We’ve been repairing air conditioners across Dhaka since 2018, and these 8 problems account for over 90% of the “AC not cooling” complaints we get from Uttara to Jatrabari. Let’s go through each one.
The 8 Reasons Your AC Is Not Cooling in Dhaka
Dirty or Clogged Air Filter
This is the single most common reason — and the easiest to fix. In Dhaka, especially in areas like Mirpur, Mohammadpur, and Badda, dust and pollution levels are high. An AC filter can clog up within 3–4 weeks during summer. When the filter is blocked, warm air can’t pass through the system properly, which means your room never cools down no matter how long the AC runs.
What to check: Turn off the AC and slide out the front filter panel. If the mesh is visibly grey or clogged with dust, wash it with water, dry it completely, and reinstall. Do this every 2–3 weeks during summer in Dhaka.
Low Refrigerant (Gas) Level
Refrigerant is the chemical that makes your AC actually cool the air. Over time — usually 2 to 5 years — the gas level drops, and cooling becomes noticeably weaker. You might notice the air coming out feels only slightly cool instead of cold, or the indoor unit is dripping more water than usual.
This is a job for a technician. Our team handles AC gas refill in Dhaka across all major brands — Gree, General, Midea, Samsung, LG, and more. Never let anyone add gas without checking for leaks first, as adding gas into a leaking system just wastes money.
Dirty Outdoor Condenser Coils
The outdoor unit releases heat pulled from your room. If its coils are caked in dust, leaves, or grime — which happens fast in Dhaka’s environment — it can’t dump that heat properly. The result: your indoor unit keeps running but never reaches the target temperature.
The outdoor unit is often installed on a balcony or rooftop and gets neglected for years. An annual AC servicing in Dhaka includes cleaning the condenser coils and should not be skipped.
Frozen Evaporator Coils
This one surprises people. Yes — an AC can freeze from the inside. When airflow is restricted (usually due to a dirty filter) or when the refrigerant level is very low, the evaporator coil can ice up. When frozen, it cannot absorb heat from your room, so the AC blows warm or slightly cool air.
Warning: If you see ice or frost on your indoor unit’s copper pipes or if water is dripping heavily from the unit, turn the AC off immediately and call a technician. Running a frozen AC can damage the compressor — a much more expensive repair.
Faulty Compressor
The compressor is the heart of your AC system. It pressurises the refrigerant so it can absorb and release heat. When the compressor starts failing, cooling drops significantly — and eventually stops altogether. You might hear a clicking sound when the unit starts, or the outdoor unit might vibrate more than usual.
Compressor repair or replacement is one of the more costly AC repairs, but catching it early can save you from a full unit replacement. If your AC repair in Dhaka involves compressor issues, we always assess whether repair or replacement is the better investment given the unit’s age.
Refrigerant Leak
Unlike the issue of gas simply running low over time, a refrigerant leak means gas is escaping through a crack or loose joint in the copper lines or at the indoor/outdoor unit connections. Signs include a hissing sound near the unit, oily residue on pipes, or a sudden drop in cooling performance after a previously well-functioning AC.
Topping up gas without sealing the leak is pointless — it’ll escape again within weeks. Our technicians locate and seal leaks before any gas refilling service in Dhaka to ensure long-lasting results.
Thermostat or Sensor Problems
The thermostat tells the AC when the room has reached the target temperature and when to cycle back on. A faulty sensor can misread room temperature, causing the compressor to shut off prematurely — before the room is actually cool. This results in a room that cools briefly and then warms back up within minutes.
Wrong AC Capacity for the Room Size
An undersized AC will never properly cool a large room regardless of how well it’s maintained. A 1-ton AC is generally suitable for a room up to 120 sq ft. For larger rooms or rooms with poor insulation — very common in older Dhaka apartments — a higher capacity is needed. If you moved into a space and the AC has always struggled, capacity might be the core issue.
Quick Diagnosis: What’s Wrong With My AC?
Use this table to narrow down the problem before calling a technician:
| Symptom You See | Most Likely Cause | Urgency |
|---|---|---|
| AC runs but room stays warm | Dirty filter, low gas, or undersized unit | Moderate |
| Ice visible on pipes or coils | Frozen evaporator coil | Stop & Call Now |
| AC blows slightly cool only | Low refrigerant (gas needs refill) | Moderate |
| Clicking or vibrating outdoor unit | Faulty compressor | Urgent |
| AC cools briefly then room warms | Sensor or thermostat fault | Moderate |
| Hissing sound + oil residue on pipes | Refrigerant leak | Urgent |
| Outdoor unit very dirty / dusty | Clogged condenser coils | Schedule Service |
What You Can Do Right Now
- Check and clean the air filter — if you haven’t done it in a month, this alone might solve the problem.
- Check that all doors and windows are fully closed while the AC is on — a gap reduces effectiveness by 30–40%.
- Make sure the outdoor unit has at least 30 cm of clearance on all sides and isn’t blocked by furniture, plants, or a cover.
- Set the temperature between 22–24°C for maximum efficiency in Dhaka’s humidity.
- If none of these help, book a professional AC service — delaying often turns a small issue into a costly repair.
For comprehensive help, you can also review our full range of AC and appliance repair services in Dhaka to find the right solution for your specific situation.
AC Still Not Cooling? We’ll Fix It Today.
Jeet Refrigeration And AC Service Center Ltd. serves all of Dhaka — 8AM to 12AM, every day of the week.
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