AC Not Cooling in Kota Summer: 6 Common Causes

Published 7 October 2026 · Repair Centre Kota

Short answer: If the AC runs but the room stays warm, the usual causes are dirty filters or coils, low refrigerant gas, or a failing capacitor or compressor.

Common causes

Dirty air filter or coil. Dust blocks airflow, so the AC cools less. In dusty weather, clean the filters every two to four weeks.
Low refrigerant gas. Gas is not used up, so low gas means a leak. The leak must be fixed before refilling. Ice on the pipe is a common sign.
Dirty outdoor unit. Dust or lint on the outdoor coil stops the AC from releasing heat, so cooling drops on very hot days.
Weak capacitor or failing compressor. The outdoor fan runs or hums, but the compressor does not start or stops quickly.
Wrong capacity or settings. A 1-ton AC in a large or sun-facing room will struggle. Check that it is in cool mode with a sensible temperature set.
Faulty sensor or PCB. The AC switches off early, blows only air, or behaves oddly with the remote.

What you can check safely

Clean or rinse the indoor filters and let them dry
Check the remote is in cool mode and the temperature is set below room temperature
Look at the outdoor unit: the fan should be running
Check the MCB has not tripped
Look for ice on the indoor unit or the thin pipe

When to call a technician

Call a technician if there is ice on the pipe, the outdoor unit does not run, there is a burning smell or the MCB keeps tripping. Do not open the outdoor unit yourself.

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