AC Not Cooling in Summer? Top Reasons & Expert Fixes
Introduction
During peak Bangalore summers, an air conditioner that fails to cool can quickly turn your home or office into an uncomfortable space. One of the most common service requests we receive at Xpert Electronics is: “My AC is running but not cooling properly.”
An AC not cooling is not always a major fault. In many cases, it’s caused by poor maintenance, minor electrical issues, or blocked airflow. However, ignoring the issue can lead to compressor damage and expensive repairs.
In this detailed guide, we’ll explain:
Why your AC is not cooling in summer
Common AC cooling problems
DIY checks you can do
Permanent expert solutions
When to call a professional AC technician in Bangalore
Dirty Air Filters – The #1 Reason AC Stops Cooling What Happens?
Air filters trap dust, pollen, and pollution particles. Over time, these filters get clogged, restricting airflow.
Symptoms
AC running but room not getting cold
Weak airflow from vents
Higher electricity bill
DIY Fix:
Remove the front panel
Clean filters using water
Dry completely before refitting
Expert Fix:
If filters are damaged or extremely clogged, replacement is recommended during professional AC servicing.
Tip: Clean filters every 15–30 days during summer.
Low Refrigerant (Gas Leakage)
Why It Happens:
Improper installation
Old copper pipes
Small gas leaks over time
Symptoms:
AC blows air but not cold
Ice formation on indoor unit
AC takes too long to cool
Why DIY Is Dangerous:
AC gas refilling requires
Pressure testing
Leak detection
Correct refrigerant quantity
❌ Never refill gas without fixing the leak.
Expert Solution:
At Xpert Electronics, we:
Detect leaks using nitrogen testing
Repair copper lines
Refill gas as per manufacturer specs
Faulty Compressor (Serious Issue)
What Is the Compressor?
The compressor is the heart of your AC. It circulates refrigerant to remove heat.
Symptoms:
Outdoor unit not running
Loud noise or clicking sound
AC turns on but no cooling
Fix:
Capacitor replacement (minor issue)
Compressor replacement (major repair)
⚠️ Compressor repairs should only be done by certified technicians.
Dirty Condenser Coils
What Happens?
Outdoor unit coils release heat. Dust and pollution reduce heat dissipation.
Symptoms:
AC cools initially, then stops
Outdoor unit overheating
Increased power consumption
Solution:
Chemical jet wash during servicing
Regular outdoor unit cleaning
Incorrect Thermostat Settings
Common Mistakes:
Temperature set too high
AC in fan mode
Faulty thermostat sensor
Fix:
Set temperature between 22–24°C
Reset thermostat
Replace sensor if faulty
Electrical & Capacitor Issues
Symptoms:
AC trips frequently
Outdoor unit not starting
Delayed cooling
Fix:
Capacitor testing
Wiring inspection
Voltage stabilizer check
Improper AC Size for Room
Problem:
If AC capacity (tonnage) is too low
AC runs continuously
Poor cooling
High electricity bills
Recommendation:
1 Ton → Small bedroom
1.5 Ton → Medium room
2 Ton → Large hall
Poor Installation or Blocked Airflow
Issues:
Incorrect indoor unit height
Furniture blocking airflow
Bent air fins
Solution:
Reinstallation
Airflow optimization
Fin straightening
When to Call Professional AC Repair in Bangalore
Call experts if:
AC not cooling after cleaning filters
Ice formation occurs
Gas leakage suspected
Loud noises from outdoor unit
📞 Same-day AC repair prevents costly damage.
💰 AC Repair Cost in Bangalore (Approx.) Service Cost Range General AC Service ₹499 – ₹699 Gas Refilling ₹1,800 – ₹3,500 Capacitor Replacement ₹800 – ₹1,500 Compressor Repair ₹4,000+
