If your aircon is running but something feels “off”, these air conditioner problems and symptoms help match the issue to the correct fix path. In Kuala Lumpur’s heat and humidity, airflow, drainage, and coil condition are common root factors — but electrical and refrigerant issues also happen.
Detailed problem pages are currently being prepared.
This page helps you identify the correct issue and service path.
Start here (fast routing)
If you’re not sure what the real cause is, begin with troubleshooting first.
It prevents paying for the wrong service and helps route the correct technician.
Most common symptoms (Problem Pages)
Cooling & airflow
Not Cooling
Aircon runs but room stays warm
Weak Airflow
Low air volume from vents
Blowing Warm Air
warm air instead of cold
High Electric Bill
increased usage, poor efficiency
Uneven Cooling
different room temperatures, hot spots
Water & drainage
Water Leaking
visible leaks around indoor unit
Indoor Unit Leaking
leak source from indoor body/pan
Water Dripping
steady dripping during operation
Drain Pipe Clogged
blocked drainage line causing overflow
Smell, mould & hygiene
Bad Smell
musty or sour smell when the aircon is running
Mold Issue
recurring smell or visible mould growth inside the unit
Noise, vibration & shutdown
Vibration Issues
shaking, humming, or imbalance
Making Noise
rattling, buzzing, clicking, or grinding sounds
Overheating Shutdown
unit stops after running for some time
Electrical & control issues
Not Turning On
no response when switching on
Trips Breaker
breaker trips when the aircon starts
Remote Not Working
remote control does not respond
Error Codes
error code shown on the indoor unit display
Refrigerant & outdoor unit
Gas Leak
cooling performance gradually drops over time
Outdoor Unit Not Running
outdoor fan or compressor not operating
Note: Refrigerant does not normally “run out”. If gas is low, a leak check is required before refilling.
Safe checks before calling a technician
Before booking a service, you can safely check the following:
- Confirm the unit is in COOL mode and temperature is set lower than room temperature
- Clean and fully dry the indoor air filters
- Make sure the outdoor unit has clear airflow and is not blocked
- If ice is visible, switch the unit OFF and allow it to fully defrost
Do not open panels or touch wiring. Electrical symptoms require professional inspection.
When to stop troubleshooting and book service
Stop troubleshooting and contact a technician if you notice:
- burning smell, sparks, or repeated breaker trips
- outdoor unit not running or very loud abnormal noise
- persistent leaking, icing, or no cooling after basic checks
- error codes that return after reset
These symptoms indicate faults that should not be ignored.
How to choose the correct aircon service
Each symptom listed above points to a different service path.
Cooling, leaks, and noise usually require repair.
Bad smell and weak airflow often require chemical wash.
Routine performance issues are handled by servicing.
Diagnosis always comes first to avoid unnecessary work.
Air conditioner problems often show similar symptoms but require different solutions.
This page groups common aircon issues by symptom to help with repair diagnosis and service selection in Kuala Lumpur.
Recommended fix paths (based on diagnosis)
Depending on the symptom and diagnosis, the correct service may include:
- aircon repair for cooling, leaks, noise, or electrical faults
- chemical wash for bad smell, weak airflow, or internal dirt buildup
- full servicing for maintenance-related performance issues
Diagnosis always comes before choosing the service.
Need help in Kuala Lumpur?
If you need assistance, message us with:
- your KL area
- aircon type (wall-mounted or cassette)
- main symptom from the list above
- how long the issue has been happening
This helps route the correct technician and reduces unnecessary work.