Loading…
Loading page
Same-Day Aircond Installation & Servicing Across KL & Selangor — From RM199
Loading…
Troubleshooting Hub
Twenty of the most common aircond problems — not cooling, water leaking, strange noises, bad smells, tripped power and error lights — explained with their likely causes, the checks you can safely do yourself, and what a KL Renovator technician fixes on-site, with the price confirmed before work starts.
Cooling Problems
Low gas, dirty coil or a failing capacitor — the usual suspects.
Warm air and longer cooling cycles point to low refrigerant.
Ice on the coil — low gas or a blocked airflow path.
Dirty filters and a clogged blower are the first things to check.
Water & Odour
A blocked drain pipe is behind most indoor-unit leaks.
Drips from the front panel usually mean a dirty drain pan.
Constant dripping is a drainage problem, not a cooling one.
Mould and biofilm on a wet coil — a chemical wash resolves it.
Electrical & Mechanical
Remote, power supply or PCB — traced in order of likelihood.
A failing capacitor or PCB is the usual trip cause.
Grinding or rattling points to bearings, blades or a loose part.
Runs but won't cool — honest repair-vs-replace advice.
Expert Repair
Component-level repair with the price confirmed before work.
RM 88Every symptom explained from filters to compressor.
What each brand's blinking pattern actually means.
Timer or operation lights flashing — sensor or PCB fault.
A quick-reference table for the most frequent call-outs we handle. The typical fix is what most jobs need; the final diagnosis is confirmed on-site.
| Symptom | Likely Cause | Typical Fix | From |
|---|---|---|---|
| Not cold enough | Low gas or dirty coil | Gas top-up or chemical wash | RM 99 |
| Water leaking from indoor unit | Blocked drain pipe | Drain flush (basic service) | RM 99 |
| Making noise | Loose parts / worn fan bearing | Inspection & part replacement | RM 88 |
| Bad smell | Mould & biofilm on the coil | Pressure chemical wash | RM 120 |
| Tripping power | Faulty capacitor or PCB | Component replacement | RM 150 |
| Blinking error light | Sensor or PCB fault | Component replacement | RM 150 |
| Ice forming on the coil | Low gas or blocked coil | Gas top-up or chemical overhaul | RM 420 |
| Unit not turning on | Remote, power supply or PCB | Diagnosis & repair | RM 88 |
Start with the DIY checks every guide includes — cleaning the filter, checking the remote battery, confirming the circuit breaker. These solve a surprising share of 'broken' aircond calls, and they cost nothing. Anything involving the sealed refrigerant circuit, mains electricity or dismantled parts is technician work.
Every problem guide lists the likely causes in order of frequency, plus the published price for the fix. KL Renovator charges an RM 88 diagnostic fee that is waived when you approve the repair — you never pay for a guess.
A clogged filter that slows cooling, a remote with dead batteries, a tripped breaker, and a unit that simply needs a power reset. Anything with refrigerant gas, mains wiring, the compressor or water leaking from the indoor unit is safer left to a licensed technician — the guides below show what each fix costs.
Every guide, tool and service page in this cluster.
DIY aircond troubleshooting guide for Malaysia. Find out what is causing your aircond problem and whether you can fix it yourself.
Read GuideBlinking lights, DB trips, loud noise or no cooling? Learn how professional troubleshooting finds the real fault before replacing parts.
Read GuideAircond light blinking in Malaysia? Learn how to record the pattern, read model-specific error codes, reset safely and know when to call a technician.
Read GuideYour aircond is switched on but the room is still warm. Here are the 7 most common reasons why — and what to do about each one.
Read GuideWater dripping from your indoor aircond unit is one of the most common problems in Malaysia. Here's what causes it and how to fix it properly.
Read GuideA chemical wash won't fix everything. Here are 5 clear signs that your aircond unit needs a full chemical overhaul — and what happens if you keep delaying it.
Read GuideNew aircond in KL not cold in the first month? Settings, vacuum, HP size and published diagnosis from RM 88 — before you blame the brand.
Read GuideStorm flicker in KL fried the PCB? What a surge does to an inverter aircond, first checks, and published repair prices from RM 88.
Read GuideIf your aircond is running but not producing cold air, the most common causes are low refrigerant gas, a dirty evaporator coil, or a faulty capacitor. KL Renovator diagnoses and fixes all aircond cooling problems across KL and Selangor.
Read GuideWeak or reduced airflow from your aircond is caused by a blocked evaporator coil or blower wheel. A chemical wash by KL Renovator removes the blockage and fully restores airflow.
Read GuideLow refrigerant gas causes warm air, longer cooling cycles, ice formation and high electricity bills. KL Renovator tops up R22, R410A and R32 gas with precision balancing and leak check included.
Read GuideA gas leak causes repeated cooling failure even after top-ups. KL Renovator identifies the leak source, repairs the copper pipe or valve, then tops up the refrigerant to correct pressure.
Read GuideAircond ice formation is caused by low refrigerant gas or severely blocked evaporator coils. KL Renovator diagnoses the root cause and performs the correct service — gas top-up or chemical overhaul.
Read GuideA leaking aircond indoor unit is usually caused by a blocked drain pipe or dirty drain pan. KL Renovator diagnoses and repairs all water leaking issues across KL and Selangor with same-day service.
Read GuideWater dripping from the indoor unit is the most common aircond complaint in Malaysia. Caused by blocked drain pipes or dirty drain pan. KL Renovator clears blockages and performs overhaul to permanently fix indoor unit leaks.
Read GuideWater dripping from the indoor unit is caused by a blocked drain pipe, dirty drain pan, or frozen evaporator coil. KL Renovator clears blockages and performs chemical wash or overhaul to stop the dripping.
Read GuideBad smells from your aircond are caused by mould and bacteria buildup on the evaporator coil and blower wheel. A chemical wash or chemical overhaul by KL Renovator permanently removes the smell.
Read GuideIf your aircond does not respond to the remote or power button, the cause could be a tripped MCB, faulty PCB, failed capacitor or wiring issue. KL Renovator performs a full diagnosis and fixes the problem.
Read GuideAn aircond that repeatedly trips the MCB or power supply has an electrical fault — usually a shorted compressor, faulty capacitor or wiring issue. KL Renovator diagnoses and repairs all electrical aircond faults.
Read GuideBlinking lights on your aircond indicate an error code. Common causes include dirty sensors, low gas, PCB faults or communication errors. KL Renovator reads error codes for all brands and resolves the root cause.
Read GuideIf your aircond remote is not responding, the issue could be a dead battery, faulty remote, or a damaged IR receiver on the indoor unit. KL Renovator replaces remotes and repairs IR receivers for all brands.
Read GuideThermostat problems cause the aircond to run non-stop, not reach the set temperature, or shut off too early. KL Renovator diagnoses temperature sensor and thermostat faults for all brands across KL and Selangor.
Read GuideUnusual noises from your aircond — rattling, buzzing, or grinding — usually indicate a loose part, dirty fan blade, or failing fan motor. KL Renovator diagnoses and fixes all aircond noise problems.
Read GuideIf your aircond indoor or outdoor fan has stopped working, the cause is usually a burnt-out fan motor or failed capacitor. KL Renovator replaces fan motors for all brands with same-day service.
Read GuideAn outdoor unit that does not start or run usually indicates a compressor, fan motor or capacitor failure. KL Renovator diagnoses and repairs outdoor unit problems for all brands across KL and Selangor.
Read GuideA failing compressor causes the aircond to run without cooling. KL Renovator performs a full diagnosis to confirm if the compressor needs repair or replacement, with a transparent quote before work begins.
Read GuideA faulty PCB (printed circuit board) causes blinking error lights, erratic operation or complete shutdown. KL Renovator diagnoses PCB faults and replaces boards for all major brands.
Read GuideA dirty aircond coil or low refrigerant gas forces the compressor to work harder, dramatically increasing electricity consumption. A chemical wash or gas top-up by KL Renovator can reduce your bill significantly.
Read GuideExpert diagnosis and replacement of faulty aircond parts — capacitors, fan motors, sensor coils, PCB boards, or copper wiring. Quote before work.
Read GuideReal Repair Work
Diagnosis, gas balancing, part replacement and deep cleaning — real KL Renovator repair jobs photographed across KL & Selangor.
KL Renovator technician working on an aircond repair job in Petaling Jaya
Technician testing an aircond with a multimeter during a fault diagnosis in Puchong
Panasonic aircond PCB board being inspected and repaired on-site in Subang Jaya
Daikin aircond drain issue being repaired to stop water leaking in Kuala Lumpur
The diagnostic fee is RM 88. It is waived in full when you approve a repair with us, so you only pay for the fix. If you decide not to proceed, the RM 88 covers the technician's time and the report of what is wrong.
If it is still blowing cool air, yes — but expect a higher electricity bill while it runs inefficiently. If you see ice forming, smell burning, or the unit trips the breaker, switch it off and call a technician; continued running can damage the compressor.
Filter clogs, remote batteries and a tripped circuit breaker are safe, free checks. Opening the electrical panel, handling refrigerant or dismantling the indoor unit is not DIY — those are technician jobs covered in the guides below.
Same-day service is available for bookings confirmed before 11 AM across our 39 areas in Kuala Lumpur and Selangor. Emergency slots for complete breakdowns or heavy leaks are prioritised.
Musty smell comes from mould and bacteria growing on the wet evaporator coil and blower wheel. A pressure chemical wash dissolves the biofilm and rinses it out through the drain — for very heavy build-up, a chemical overhaul at RM 420 is the complete fix.
Topic Hubs
Three organised libraries — pick the one that matches what you're looking for.
Every aircond price, calculator and cost guide in one place.
Explore20 problem guides with causes, DIY checks and fix prices.
You Are HereService frequency, deep cleans and AMC plans explained.
ExploreTell us the problem and your area. We diagnose, quote and repair — with the price confirmed before any work starts. All 20 brands, 39 areas, 1-month workmanship warranty.
Definitions
Short, plain-language definitions of the terms used above — written by the technicians who do the work, not copied from a manufacturer brochure.
The compressor sits in the outdoor unit and pumps refrigerant around the loop, raising its pressure so it can dump heat outside. It is the single most expensive component in the system. Most compressor failures are secondary — caused by running low on gas, a failed capacitor, a choked condenser coil or long-term voltage stress rather than by the compressor itself wearing out.
Compressor replacement is quoted from RM 800 – 2,000 — on a unit past 8 years old, compare that against a new install before approving it.
The capacitor is a small cylinder in the outdoor unit that gives the compressor and fan motor the starting kick they need. Heat ages it faster than any other part, so it is the most common single failure in Malaysian conditions. Typical symptoms: the outdoor fan hums but will not spin, the unit trips the breaker on start, or cooling works only intermittently.
A capacitor swap is quoted from RM 150 – 250 and takes minutes — always rule it out before anyone quotes you a compressor.
Refrigerant is the working fluid that carries heat out of your room. Malaysian homes run three types: R22 in older non-inverter units, R410A in mid-generation inverters and R32 in most units sold today. They operate at different pressures and use different compressor oils, so they can never be mixed or substituted — doing so damages the compressor and voids any warranty.
Photograph the outdoor unit nameplate before you book — it tells the technician the gas type and charge weight, and stops a wrong-gas quote.
Side-by-side comparison
Use age, the part that failed and the repair-to-replacement ratio — not how the unit looks.
| What to compare | Repair the existing unit | Replace with a new unit |
|---|---|---|
| Unit age | Under 7 years | Over 10 years, or R22 |
| Failed part | Capacitor, sensor, fan motor, drain pump | Compressor or corroded coil |
| Cost signal | Repair under about half a new install | Repair approaching a new install |
| Electricity | Unchanged | Modern inverter cuts long-run consumption |
In short: Get a diagnostic first (RM 88) so the decision rests on a measured fault instead of a guess — the fee is trivial next to a wrong replacement.