Stay cool and safe with this complete troubleshooting guide for Malaysian homes & offices
In Malaysia’s hot and humid weather, aircond is not a luxury — it is a necessity.
So when your aircond suddenly stops cooling, blows warm air, or cools very slowly, it becomes extremely frustrating.
The good news?
Most aircond cooling problems can be diagnosed with simple checks.
In this article, we explain the top 10 reasons why airconds stop cooling in Malaysia, common symptoms, solutions, and when you should call a professional.
1. Low Gas (Refrigerant) Level
This is the number one reason airconds stop cooling.
When gas level drops:
Cool air becomes weak
Aircond takes very long to cool
Outdoor unit stays ON constantly
Ice forms on indoor coil
Why gas becomes low:
Small pipe leak
Old installation
Loose joints
Rusted copper pipe
Typical Price (Malaysia):
Gas refill R22: RM 80 – RM 120
Gas refill R410A/R32: RM 120 – RM 180
2. Dirty Indoor Unit (Filter + Coil Block)
Dust and dirt block the airflow.
Symptoms:
Weak cooling
Bad smell
Water dripping
Aircond turns cold only for few minutes
Solution:
Clean filters every 2–3 weeks.
Do a full servicing every 3–6 months.
3. Dirty Outdoor Unit (Condenser Block)
The outdoor unit releases heat.
If it is dirty → heat cannot escape → cooling drops.
Symptoms:
Outdoor fan feels very hot
Aircond cools slow
High electricity bill
4. Faulty Capacitor (Very Common in Malaysia)
Capacitor helps compressor start properly.
If it is weak:
Cooling becomes slow
Compressor turns ON/OFF frequently
Noisy outdoor unit
Sometimes warm air only
Price (Malaysia):
RM 60 – RM 120 (depending on HP)
5. Compressor Problem
If compressor is weak or dead → no cooling at all.
Signs:
Outdoor unit not running
Warm air only
Unit keeps shutting down
Note:
Compressor issues require professional diagnosis.
6. Thermostat or Sensor Issue
If the temperature sensor is faulty, the unit may stop cooling even though the room is hot.
Symptoms:
Unit starts then stops quickly
Cooling inconsistent
7. Aircond Too Small for the Room Size
Example:
1HP for living room → NOT enough
1.5HP for large master bedroom → borderline
Correct Aircond Size Guide (Malaysia):
Small room (80–120 sq ft): 1.0 HP
Medium room (120–180 sq ft): 1.5 HP
Large room (180–280 sq ft): 2.0 HP
Living room: 2.5 HP or above
8. Pipe Choking / Blockage
If the refrigerant pipe is choked:
Cooling becomes very weak
Ice forms
Water leaks from indoor unit
Solution:
Chemical service or pipe flushing.
9. Fan Motor Weak or Faulty
If the fan is slow, cooling will drop drastically.
Signs:
Weak air flow
Noisy fan
Slow rotation
Room takes too long to cool
10. Lack of Servicing (Most Malaysian Homes)
When servicing is delayed:
Gas pressure drops
Dust blocks coils
Water starts leaking
Cooling reduces
Recommended Servicing Frequency:
Residential: Every 3–6 months
Shop/office: Every 2–3 months
Quick Checklist Before Calling Technician
✔ Clean air filters
✔ Check if outdoor unit is running
✔ Ensure windows/doors closed
✔ Set temperature to 16–18°C
✔ Put mode on “Cool” (NOT dry/fan)
✔ Check remote batteries
If still not cooling → problem is inside the system.
When Should You Call an Aircond Professional?
Call immediately if:
Aircond blowing warm air
Gas smells near outdoor unit
Ice forming on pipes
Water dripping badly
Outdoor unit not running
Aircond keeps tripping the MCB
Cooling takes too long
These issues require experienced handling.
Professional Aircond Service in Subang Jaya & Klang Valley
Our team at Sumon Electrical & Hardware Trading provides:
Aircond servicing
Gas refill (R22 / R410A / R32)
Chemical cleaning
Aircond installation
Compressor diagnosis
Capacitor replacement
Full troubleshooting
Electrical & wiring check
Water leak treatment
📞 WhatsApp (24 Hours): +601116109510
📍 Shop Location:
Lot K10004, Ground Floor, Goodyear Court 7,
USJ 14, Subang Jaya, Selangor
Google Map 👉 https://maps.app.goo.gl/CqTZ24KzNDvmfK1y8?g_st=awb