Aircon Knowledge Base
Articles across guides, parts, cases, and problems.
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Browse every article across guides, parts explainers, cases, and problem diagnostics.
4 Mistakes to Avoid Before Calling an Aircon Technician
4 Rules for Prioritizing Multiple Aircon Issues in One Visit
4 Signs Your Aircon Capacitor Is Weakening
4 Signs Your Aircon Fan Motor Is Failing
4 Things Coastal Homeowners Should Know About Servicing
4 Things to Check at Your New Aircon Installation Handover
4 Things Your Aircon Noise Is Telling You
5 Mistakes When Choosing an Aircon for Your HDB
5 Reasons Your Aircon Keeps Leaking After Servicing
5 Reasons Your Aircon Smells Even After Servicing
5 Reasons Your New Aircon Is Not As Cold As Expected
5 Signs Your Aircon Compressor Is Failing
5 Signs Your Aircon Drain Is About to Clog
5 Signs Your Aircon Gas Is Leaking
5 Signs Your Aircon Installation Was Done Poorly
5 Signs Your Aircon Is Undersized for the Room
5 Signs Your Aircon Needs a Chemical Servicing
5 Signs Your Aircon PCB Is Faulty
5 Signs Your Aircon Technician Missed Something
5 Things That Make Your Room Harder to Cool
5 Things That Void Your Aircon Warranty
5 Things to Check Before Approving an Aircon Repair Quote
5 Things to Check Before Buying an Aircon
5 Things to Confirm Before Your Condo Aircon Installation
5 Things to Know About Cleaning Your Aircon Filter Yourself
5 Things to Know About HDB Aircon Permits
5 Things to Tell Your Technician Before a Service Visit
6 Mistakes That Shorten Your Aircon Lifespan
7 Reasons Your Aircon Electricity Bill Spiked
Ad Hoc vs Contract Aircon Servicing: Which Saves More?
After Aircon Install: Which Noises Are Normal?
Air Felt Cold but Barely Any Wind: Dust-caked Blower and Coil
Aircon Blower Wheel: Dirty, Damaged, or Just the Filter?
Aircon Bracket: Wall Vibration or Internal Fault?
Aircon Capillary Tube: Weak Cooling or Gas Leak?
Aircon Compressor: When Replacement Is Real
Aircon Condenser Coil: Weak Cooling From the Outdoor Unit
Aircon Contactor and Relay: Outdoor Switching Faults
Aircon Copper Pipes: Repeat Gas Loss and Cooling Drops
Aircon Cuts Out Every Afternoon: Trapped Heat in Outdoor Alcove
Aircon Diagnosis vs Servicing: Which to Book First?
Aircon Display Board: Buttons or Display Not Responding
Aircon Drain Pan: Water Leak or Blocked Drain?
Aircon Drain Pipe: Blocked, Leaking, or Poorly Routed?
Aircon Drain Pump: Leak or Shutdown on Pump Systems
Aircon Drain Trap: Gurgling, Slow Drain, or Odd Leaks
Aircon Dry Mode vs Cool Mode: Which Should You Use?
Aircon Dual Run Capacitor: Two Motors, One Fault
Aircon Evaporator Coil: Weak Cooling After Servicing?
Aircon Expansion Valve: Unstable Cooling or Gas Leak?
Aircon Filter: The First Thing to Check
Aircon Flare Joint: Slow Gas Loss at the Connection
Aircon Float Switch: Why Your Unit Keeps Shutting Off
Aircon Four-way Valve: Mode Switching and Cooling Faults
Aircon Gas Top-Up vs Leak Repair: Which Is Needed?
Aircon General Service vs Chemical Servicing: Which Do You Need?
Aircon Indoor Fan Motor: Weak Airflow or Dirty Filter?
Aircon Indoor PCB: Unit Responds but Won't Cool
Aircon Indoor Thermistor: Early Cut-off and Warm Rooms
Aircon Insulation Foam: Sweating and Indoor Drips
Aircon Interconnect Wire: Signal Faults Between Units
Aircon IPM: Unstable Inverter or No Cooling
Aircon IR Receiver: Remote Presses, Nothing Happens
Aircon Isolator Switch: No Power to the Outdoor Unit
Aircon Issue Came Back After Servicing: What to Do Next
Aircon Liquid Line: Wet or Frosted Pipe Explained
Aircon Only Trips When It Rains: Water in the Outdoor Switch Box
Aircon Outdoor Fan Blade: Noise, Vibration, or Weak Cooling
Aircon Outdoor Fan Motor: Heat Trap That Kills Cooling
Aircon Outdoor PCB: Looks Like a Dead Compressor
Aircon Outdoor Thermistor: False Overheat Shutdowns
Aircon Overhaul vs Replace the Indoor Unit: How to Choose
Aircon Overload Protector: Why Cooling Cuts Out
Aircon PCB Repair vs Replacement: How to Decide
Aircon Pipe Insulation: Dripping Pipes or Real Leak?
Aircon Pressure Sensor: Inverter Faults and False Trips
Aircon Refrigerant: Top-up Without Leak Check Is Wasted
Aircon Remote Not Working: Unit Fault or Remote Fault?
Aircon Repair Deposit and Part Order: When Should You Pay?
Aircon Replacement in Phases: Room-by-Room Strategy
Aircon Run Capacitor: The Cheap Fix That Looks Like a Dead Compressor
Aircon Service Contract: What Is Usually Included?
Aircon Service Valve: Post-service Cooling Failure
Aircon Shutting Off Mid-cycle: Temperature Sensor Gone Bad
Aircon Sleep Mode vs Auto Mode: Which to Use at Night?
Aircon Spare Part on Order: What to Do While You Wait
Aircon Start Capacitor: Motor Hums but Won't Spin
Aircon Suction Line: Dripping or Frosted Pipe?
Aircon Swing Motor: Flap Stuck or Not Moving?
Aircon Technician Says Monitor First: When It's Right
Aircon Terminal Block: Burning Smell or Breaker Trips
Aircon Tick Rating: What 5 Ticks Actually Means
Aircon Timer vs Manual Off: Which Saves More Electricity?
Aircon Vibration Pad: Noise Fix or Deeper Problem?
Aircon Warranty vs Workmanship Warranty: What's Covered?
All Four Rooms Down at Once: Outdoor Board Died
All Four Rooms Went Warm: Single Leak at the Outdoor Unit
Auto Mode Kept Shutting Off: Sensor Thought the Room Was Already Cold
Bedroom Unit Buzzing at Night: Loose Wall Bracket, Not Compressor
Best Aircon Brand in Singapore: How to Actually Compare
Bigger Aircon or Second Unit: Which Is Smarter?
Brand-new BTO Unit Never Felt Cold: Undercharged From Install
Breaker Tripping With a Hot Smell: Damaged Isolator, Not Compressor
Cafe Unit Barely Cooling: Years of Grease Sludge on the Evaporator Coil
Can You Reuse Aircon Piping When Replacing the System?
Capacitor Swap Didn't Fix It: Outdoor Board Was the Actual Fault
Carrier Aircon Blinking Light Guide
Carrier Aircon E1 Error: What It Means and What to Do
Carrier Aircon Owner's Guide
Cassette Airflow Getting Weaker: Corrosion Slowing the Fan Motor
Cassette Dripping Onto Desks: Drain Sludge, Not a Cracked Pan
Cassette Leaking After Heavy Rain: Drain Outlet Froze Briefly
Cassette Not Cooling: Stuck Expansion Valve, Not Compressor
Cassette Rattling at Certain Speeds: Loose Fan Blade Clip
Cassette Started Dripping After Routine Cleaning: Drain Trap Dried Out
Ceiling Drip Only on Humid Afternoons: Hidden Gap in the Drain Pipe
Ceiling Drip With Error Code: Drain Pump Motor Failed
Ceiling Fan With Aircon: Does It Save Electricity?
Ceiling Unit Dripping After Quarterly Service: Drain Left Loose
Clicking Sound Then Shutdown: Cracked Blower Catching on Housing
Climate Voucher for Aircon: Full Guide
Coastal Condo Not Cold: Evaporator Grime, Not a Gas Leak
Coastal Unit Losing Gas Again: Salt Ate Through the Pipe Fitting
Concealed Unit Dripping From the Panel: Condensate Pump Seized
Cooling and Dripping Both Worse After Chemical Servicing: Bad Reassembly
Daikin Aircon A3 Drain Error: Why It Happens
Daikin Aircon Blinking Light Guide
Daikin Aircon Owner's Guide
Daikin Aircon U4 Error: What It Means and What to Do
Daikin vs Mitsubishi Aircon: How to Actually Decide
Dehumidifier vs Aircon Dry Mode: Which Is Better?
Drips Only on Humid Days: Drain Pipe Sagged and Water Pools Inside
Ducted System Getting Weaker for a Year: Ceiling Filter Never Cleaned
Error Appeared After Thunderstorm: Connection Shaken Loose
Error Appeared Right After Servicing: Board Locked, Not Dead
Error Code the Day Renovation Finished: Signal Wire Nicked
Error Keeps Coming Back After Every Reset: Corroded Wire Connection
Error Keeps Returning After Drain Clearing: Sagging Pipe Trapping Sludge
Error Only After Running for Hours: Corroded Wire Joint in the Ceiling
Error Returns After Every Reset: Corroded Outdoor Connections
Error Started After Neighbour's Renovation: Cable Insulation Nicked
EuropAce Aircon Owner's Guide
Factory Office Aircon Keeps Tripping: Corroded Isolator Switch
Factory Office Barely Cooling: Condenser Coated in Industrial Dust
Five-year-old Unit Losing Cooling: Salt Crust on the Condenser
Four-year-old LG Losing Gas: High-floor Wind Corroding the Pipes
Fujitsu Aircon Blinking Light Guide
Fujitsu Aircon Owner's Guide
Gas Keeps Running Out: Pinhole Leak in Pipe Behind the Wall
Gas Leak Returned After Weld Repair: Corroded Section Too Far Gone
Gas Topped up Three Times: Hidden Leak at the Service Valve
Getting Less Cold Despite Regular Servicing: Deep Coil Buildup
Grinding Noise Then Shutdown: Fan Motor Bearings Worn Out
High Electricity Bill and Weak Cooling: Outdoor Unit Undersized
Hitachi Aircon Blinking Light Guide
Hitachi Aircon Owner's Guide
How Long Does an Aircon System Last?
How Much It Costs to Run Your Aircon Per Hour in Singapore
How Often Should You Do an Aircon Chemical Servicing?
How Often Should You Really Service Your Aircon?
How Often Should You Top up Aircon Gas?
How Soon Should You Service a Brand New Aircon?
How to Compare Aircon Service Quotes
How to Plan Aircon Servicing for Rental Units
How to Reduce Your Aircon Electricity Bill
How to Size Your Aircon Before Comparing Quotes
Ice Forming on the Copper Pipe: Airflow Blockage, Not Low Gas
Indoor Fan Blowing but Outdoor Silent: Faulty Starter Relay
Inverter vs Non-Inverter Aircon: Which One Makes Sense?
Is a Chemical Overhaul Worth It for an Older Aircon Unit?
Is Aircon Diagnosis Fee Worth It?
Is Extended Warranty for Aircon Worth It?
Kitchen Aircon Barely Pushing Air: Grease Buildup on Blower
Landed Home Cooling Fading: Condenser Choked With Leaf Litter
LG Aircon Blinking Light Guide
LG Aircon CH35 CH38 Error: Gas Leak or Sensor Fault?
LG Aircon Owner's Guide
LG CH35 Error in Bedok: Gas Leak at the Outdoor Connections
LG System-3 Losing Gas: Leak at Outdoor Unit, Not Inside Walls
LG Unit Topped up Twice: Corroded Outdoor Pipe Connections
Loud Rattle on Startup That Fades: Motor Bearings Worn Out
MHI Aircon Gas Leak Error Codes
Midea Aircon Blinking Light Guide
Midea Aircon Owner's Guide
Mitsubishi Electric Aircon Owner's Guide
Mitsubishi Electric E6 E7 Error: Causes and Fixes
Mitsubishi Electric Starmex Aircon Blinking Light Guide
Mitsubishi Heavy Aircon Owner's Guide
Mitsubishi Heavy Industries Aircon Blinking Light Guide
New Aircon Never Cooled Properly: Installer Undercharged the Gas
New Board Didn't Fix It: Temperature Sensor Was the Problem All Along
New Install Acting Strange: Two Wires Swapped During Installation
New Unit Dripping After First Service: Drain Pan Not Reseated
One Condenser vs Two Condensers for Home Aircon
One Room Warm, Other Rooms Fine: Bad Indoor Board, Not Low Gas
One Side of Office Warm, Other Side Fine: Zone Damper Stuck
One Side of the Room Always Warmer: Stuck Louver Vane
One Unit Showing Error, Others Fine: Indoor Board Dead
Outdoor Unit Buzzing and Clicking: Capacitor, Not Compressor
Outdoor Unit Completely Dead: Compressor Confirmed Failed
Outdoor Unit Getting Louder at Night: Mounting Rubber Hardened
Outdoor Unit Not Starting: Capacitor Failed, Not Compressor
Outdoor Unit Running but No Air Inside: Fan Motor Burnt Out
Panasonic Aircon Blinking Light Guide
Panasonic Aircon F91 F95 Error: Is It a Gas Leak?
Panasonic Aircon H11 Error: What It Means and What to Do
Panasonic Aircon Owner's Guide
Perfectly Fine Before Service, Warm After: Valve Left Half-closed
Persistent Musty Smell: Mould Deep Inside the Cooling Coil
PRISM+ Aircon Owner's Guide
R32 vs R410A Aircon: What Homeowners Should Know
Random Error Code With No Pattern: Drain Pump Cable Causing Interference
Rattling Every Startup: Blower Wheel Loose on the Shaft
Remote Stopped Working Completely: Receiver Broken, Not the Board
Same-Day Aircon Repair: When Should You Book It?
Samsung Aircon Blinking Light Guide
Samsung Aircon E1 E2 Error: Causes and Fixes
Samsung Aircon E3 Pressure Error: What to Check
Samsung Aircon Owner's Guide
Sharp Aircon Blinking Light Guide
Sharp Aircon Owner's Guide
Should You Do an Aircon Chemical Servicing After Renovation?
Should You Get a Second Opinion Before Major Aircon Repair?
Should You Replace Only the Aircon Outdoor Unit?
Should You Service Aircon Before Tenant Handover?
Should You Service Aircon Before Warranty Ends?
Starmex vs MHI Aircon: Which Mitsubishi Should You Pick?
Started Short Cycling After Service: Sensor Knocked Out of Clip
Study Always Warmer Than the Rest: Airflow Damper Jammed Shut
System 3 vs System 4 Aircon: How to Decide
Three Zones Failed Overnight: One Relay on the Outdoor Board
Toshiba Aircon Blinking Light Guide
Toshiba Aircon Owner's Guide
Two Bedrooms Losing Cooling Together: Pinhole Coil Leak
Two Sides Blowing Strong, Two Sides Weak: Blower Caked on One Side
Two Top-ups in Four Months: Slow Leak at the Indoor Pipe Joint
Water Dripping Onto Parquet Floor: Algae Blocking the Drain Tray
Water Marks on Ceiling: Drain Pump Switch Stuck by Sludge
What Aircon Installation Actually Costs in Singapore
What Aircon Servicing Actually Costs in Singapore
What Your Aircon Installation Quote Isn't Showing You
What Your Aircon Technician Should Tell You After Diagnosis
When to Repair Your Aircon and When to Replace It
Where Can You Put Your Aircon Outdoor Unit?
Which Aircon Service Do I Need?
Whole System Shuts Down When One Room Turns On: Faulty Indoor Board
Why Does My Aircon Fan Keep Running After Turning Off?
Why Does My Aircon Keep Tripping the Breaker?
Why Does My Aircon Keep Turning Off?
Why Does My Aircon Leak Only When It Rains?
Why Does My Aircon Lose Cooling When Two Rooms Are On?
Why Does My Aircon Only Cool at Night?
Why Does My Aircon Restart After a Power Fluctuation?
Why Does My Aircon Smell Like Burning?
Why Does My Aircon Smell?
Why Does My Aircon Still Smell After Cleaning?
Why Does My Aircon Trip When Multiple Units Are On?
Why Does My Room Feel Humid With the Aircon On?
Why Does One Aircon Unit Trip the Whole System?
Why Is Ice Forming on My Aircon Pipe?
Why Is My Aircon Beeping Randomly?
Why Is My Aircon Blowing Mist?
Why Is My Aircon Blowing Weakly?
Why Is My Aircon Cold Then Warm?
Why Is My Aircon Cooling Unevenly?
Why Is My Aircon Fan Speed Not Changing?
Why Is My Aircon Hissing?
Why Is My Aircon Indoor Unit so Loud?
Why Is My Aircon Leaking Water Inside?
Why Is My Aircon Light Flashing?
Why Is My Aircon Louvre Not Moving?
Why Is My Aircon Making a Clicking Noise?
Why Is My Aircon Making a Gurgling Noise?
Why Is My Aircon Not Cold After Servicing?
Why Is My Aircon Not Cold?
Why Is My Aircon Not Cooling One Room?
Why Is My Aircon Not Responding to the App or WiFi?
Why Is My Aircon Outdoor Fan Running but Not Cooling?
Why Is My Aircon Outdoor Unit Noisy at Night?
Why Is My Aircon Outdoor Unit Not Running?
Why Is My Aircon Outdoor Unit Too Hot?
Why Is My Aircon Pipe Sweating?
Why Is My Aircon Remote Not Working?
Why Is My Aircon Taking Too Long to Cool the Room?
Why Is My Aircon Vibrating?
Why Is There No Airflow From My Aircon?
Why Is Water Dripping From My Aircon Outdoor Pipe?
Why Pet Homes Need a Different Aircon Service Schedule
Why Won't My Aircon Turn On?
Why Your Aircon Is Not Cold at Night
York Aircon Blinking Light Guide
York Aircon Owner's Guide
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