Aircon Guides
Find out what a warning light means, what to check in a quote, or which aircon fits your home.
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Blinking lights20 pages
- Daikin aircon blinking light: what it means and what to do
- Why is my Daikin aircon leaking water from the indoor unit?
- Why is my Mitsubishi Electric aircon leaking water indoors?
- Why is my Panasonic aircon leaking water after long runs?
- Why is my LG aircon leaking water, and when did it start?
- Why is my Samsung aircon leaking water inside the room?
- Why has my Hitachi aircon started leaking water indoors?
- Why is my Carrier aircon leaking water from the ceiling?
- LG aircon blinking light: what it means and what to do
- Samsung aircon blinking light: what it means and what to do
- Panasonic aircon blinking light: what the timer LED means
- Mitsubishi Electric aircon blinking light: what to do
- Mitsubishi Heavy Industries aircon blinking light guide
- Carrier aircon blinking light: what it means and what to do
- Hitachi aircon blinking light: what it means and what to do
- Fujitsu aircon blinking light: what it means and what to do
- Toshiba aircon blinking light: what it means and what to do
- Midea aircon blinking light: what it means and what to do
- Sharp aircon blinking light: what it means and what to do
- York aircon blinking light: what it means and what to do
Error codes1 page
Symptoms/signs14 pages
- 5 signs your aircon compressor is failing, and what to do
- 4 signs your aircon capacitor is weakening
- 4 signs your aircon fan motor is failing, and what to check
- 5 signs your aircon PCB is faulty, and what to test
- 5 signs your aircon drain is about to clog
- 5 signs your aircon gas is leaking, and what to do next
- 5 signs your aircon is undersized for the room
- Aircon gas top-up vs leak repair: which is needed?
- How often should you top up aircon gas in Singapore?
- 4 things your aircon noise is telling you about a fault
- 5 things that make your room harder to cool
- Why your aircon is not cold at night, and what to check
- Signs your aircon thermistor (sensor) is failing
- Signs your aircon drain pump is failing, and what to check
Diagnosis/quotes82 pages
- Aircon diagnosis vs servicing: which should you book first?
- Is an aircon diagnosis fee worth paying in Singapore?
- Should you get a second opinion before major aircon repair?
- Technician says monitor first: when it's right
- How to spot diagnostic competence in an aircon contractor
- What your aircon technician should tell you after diagnosis
- 5 signs your aircon technician missed something
- 5 things to check before approving an aircon repair quote
- Aircon spare part on order: what to do while you wait
- Aircon repair deposit: when should you pay?
- Same-day aircon repair: when should you book it?
- 6 aircon symptoms that mean stop before restarting
- 8 aircon breaker-tripping patterns and what they narrow down
- 6 intermittent aircon faults worth logging before service
- 7 multi-split fault patterns: one room or every room?
- 8 aircon faults commonly mistaken for low gas
- 7 checks before approving an aircon gas top-up
- How technicians find an aircon gas leak: methods and limits
- Superheat and subcooling: what each reading rules out
- Aircon temperature split: how to measure it in your flat
- Does aircon gas run out? What low gas really tells you
- Aircon short cycling: why short runs damage a compressor
- Aircon tripping the ELCB or RCCB: what that tells you
- Aircon condensing unit: what is inside and what it does
- Set temperature vs room temperature: what the gap means
- Why an aircon coil ices up, and what the ice tells you
- Aircon refrigerant charge: the correct amount is a weight
- Aircon refrigerant restriction: when gas is not the fault
- Aircon pump down explained: saving the existing charge
- Aircon DB box: finding the switch that feeds your unit
- Aircon high pressure fault: why the system stops itself
- Aircon low pressure fault: usually a refrigerant shortage
- Aircon refrigerant circuit: the sealed loop explained
- Aircon heat rejection: where the heat from your room goes
- Ambient temperature: what your aircon is working against
- Aircon thermostat vs thermistor: what a split system has
- Aircon MCB explained: it protects the cable, not the unit
- Aircon EEV: why inverter systems need active metering
- How to identify the refrigerant type your aircon uses
- Aircon filter drier: why a compressor repair needs one
- Aircon PCB repair vs replacement: how to decide
- Is a chemical overhaul worth it for an older aircon unit?
- Aircon issue came back after servicing: what to do next
- 6 recurring aircon faults and the tests that found them
- 4 mistakes to avoid before calling an aircon technician
- 4 rules for prioritizing multiple aircon issues in one visit
- 7 signs you can trust an aircon company in Singapore
- 7 aircon problems fixed without replacing aircon parts
- Aircon compressor lockout: why it refuses to restart
- Overcharged vs undercharged aircon: both feel the same
- Multi-split diversity: why a System 4 shares its output
- Can R32 go into an R410A system? Why the answer is no
- Aircon Schrader valve core: a leak path rarely checked
- Dew point: the temperature that decides where water forms
- Aircon compressor windings: the motor in the refrigerant
- Aircon solenoid valve: a coil opening a refrigerant path
- Aircon thermal cutout: the part built to stop the unit
- Aircon refrigerant charge by weight: a number on record
- Aircon compressor oil: the lubricant that has to travel
- Aircon PCB fuse: a blown one is a record, not a fault
- Aircon start relay: the part that gets out of the way
- Aircon surge protection: where it sits decides its reach
- Formicary corrosion: the coil leak that starts indoors
- Aircon pressure readings: what a number needs beside it
- Galvanic corrosion: the smallest part in a joint loses
- Aircon freeze protection: weak cooling instead of ice
- Manifold gauge set: what the tool can and cannot settle
- Multi-split branch box: the valves above your ceiling
- Room temperature stratification: the air at your ankles
- Aircon compressor terminal: one burn mark, two causes
- Suction accumulator: the trap ahead of the compressor
- Aircon DC bus capacitor: not the one that gets swapped
- Aircon auto mode: what the unit decides, and how often
- Electronic leak detector: what the alarm does not prove
- Aircon high head pressure: the fault that shows no code
- Aircon refrigerant distributor: why a coil cools unevenly
- Aircon clamp meter: what an inverter does to the reading
- Aircon bridge rectifier: the stage no error code names
- Aircon fan guard: a safety part that rattles when loose
- Aircon control transformer: control power, not drive power
- Form AC-02: what an HDB flat owner is actually signing
- Aircon DC reactor: the heavy coil fitted for the mains
Servicing67 pages
- How often should you really service your aircon?
- How often should you do an aircon chemical servicing?
- General service vs chemical wash: which do you need?
- Ad hoc vs contract aircon servicing: which saves more?
- Aircon service contract: what is usually included?
- What aircon servicing actually costs in Singapore
- How to compare aircon service quotes in Singapore
- Which aircon service do I need: general, chemical, repair?
- 5 things to tell your technician before a service visit
- 5 things to know about cleaning your aircon filter yourself
- 5 signs your aircon needs a chemical servicing
- Should you do chemical servicing after renovation?
- Why pet homes need a different aircon service schedule
- 4 things coastal homeowners should know about servicing
- What salt air actually damages on a coastal aircon unit
- 6 mistakes that shorten your aircon lifespan
- Should you service your aircon before warranty ends?
- 5 things that void your aircon warranty in Singapore
- Mitsubishi Heavy aircon warranty: what it actually covers
- York aircon warranty: no Singapore terms are published
- EIKOU aircon warranty: one year, and nobody vouches
- FUJITECH aircon warranty: two figures that disagree
- Haier aircon warranty: two official pages, two terms
- Hisense aircon warranty: six years, one component only
- iFan aircon warranty: two years, and an unsettled decade
- novita aircon warranty: three years on the compressor
- PASECO aircon warranty: one year, then labour is yours
- TCL aircon warranty: the channel decides if you have cover
- PRISM+ aircon warranty: the condition on the long cover
- Trane aircon warranty: the cover you have to buy first
- Panasonic aircon warranty: the clock starts at purchase
- Mitsubishi Electric aircon warranty: when cover starts
- Fujitsu aircon warranty: where the five years stop short
- Sharp aircon warranty: valid only if you register on time
- LG aircon warranty: fifteen days to register the unit
- Carrier aircon warranty: the fourteen-day registration rule
- Daikin aircon warranty: two clocks, and the shorter wins
- Gree aircon warranty: the registration step that gates it
- EuropAce aircon warranty: who is allowed to service it
- Samsung aircon warranty: year one, then compressor only
- Toshiba aircon warranty: a parts-only cover in Singapore
- Midea aircon warranty: two years, then spare parts only
- Hitachi aircon warranty: twelve months, tied to a card
- Is an aircon extended warranty worth it in Singapore?
- How soon should you service a brand new aircon?
- DIY aircon maintenance: what you can and can't do
- The hidden costs of cheap aircon servicing
- Why cockroaches and pests get into aircon units
- Why your aircon's cover or casing turns yellow
- How to protect your aircon during renovation work
- What a chemical wash cannot fix, and what it can reach
- Aircon self-clean and auto-dry: what they actually do
- Ceiling cassette aircon: what you own above the grille
- Aircon biofilm: what the black slime is and why it returns
- Aircon coil cleaning chemistry: acid, alkali and metal
- What an FCU is: refrigerant or chilled water behind it
- Aircon coil fins: why they bend, block and cost cooling
- Aircon drain flush: what it clears and what it cannot fix
- Aircon coil fouling: what builds up and what it costs
- Chemical wash vs overhaul: what actually gets removed
- Aircon refrigerant recovery: where the old gas ends up
- Aircon drip trays and drains: a mosquito breeding risk
- Aircon gas top-up vs full recharge: two different jobs
- Counterfeit refrigerant: the one purchase nobody inspects
- Aircon drain flush vs vacuum: where the blockage ends up
- Aircon servicing: the support check that comes first
- UVC in aircon: what the lamp reaches and what it does not
Repair/replace11 pages
- Aircon overhaul vs replace the indoor unit: how to choose
- Should you replace only the aircon outdoor unit?
- Repair or replace your aircon: how to decide
- 8 aircon parts to test before replacing the whole system
- How long does an aircon system last in Singapore?
- Aircon replacement in phases: room-by-room strategy
- Disposing of an old aircon in Singapore: what NEA requires
- R22 refrigerant explained: what it means for your aircon
- Compressor burnout: the contamination it leaves behind
- HDB MOP: how long you stay changes the aircon decision
- SERS and your aircon: what a confirmed move date changes
Buying/sizing78 pages
- System 3 vs System 4 aircon: how to decide
- One condenser vs two condensers: how to choose
- How to calculate your aircon BTU before comparing quotes
- Aircon horsepower: what HP, BTU and kW each tell you
- CSPF explained: why two 5-tick aircons are not equal
- Is R32 flammable? What the A2L class means in a flat
- Rated vs actual cooling capacity: the lab and the room
- Aircon oversizing: why bigger is not the safer choice
- Aircon indoor unit: what it holds and what it gives away
- Aircon WiFi modules: what they control and what they do not
- Multi-split aircon: what sharing one condenser means
- Gold fin, blue fin: what an aircon coil coating does
- Heat load: what a room actually asks an aircon to remove
- What BTU measures, and why capacity is quoted as a rate
- What nanoe X is, and how to weigh Panasonic's claims
- Inverter vs non-inverter aircon: which one makes sense?
- R32 vs R410A aircon: what changes on a system swap
- Daikin vs Mitsubishi aircon: where they actually differ
- Daikin iSmile 2026 buying guide: is it right for your home?
- Starmex vs MHI aircon: which Mitsubishi should you pick?
- Daikin vs PRISM+ aircon: five ticks, S$98 a year apart
- Daikin vs Midea aircon: same running cost, different age
- Mitsubishi Electric vs Midea aircon: the year-seven divide
- Mitsubishi Heavy vs Panasonic aircon: parts decide it
- PRISM+ vs Mitsubishi Electric aircon: the repair window
- Daikin vs Toshiba aircon: parts and lifespan decide it
- Daikin vs EuropAce aircon: which one lasts the decade
- Mitsubishi Electric vs Fujitsu aircon: parts and lifespan
- Panasonic vs Fujitsu aircon: parts speed or running cost
- Mitsubishi Starmex 2026 buying guide: right for your home?
- Panasonic 2026 aircon buying guide: right for your home?
- Midea All Easy Pro 2026 buying guide: right for your home?
- Hitachi 2026 aircon buying guide: is it right for your home?
- LG 2026 aircon buying guide: is it right for your home?
- Samsung Wind-Free 2026 buying guide: right for your home?
- Mitsubishi Heavy SRK 2026 buying guide: right for you?
- Fujitsu 2026 aircon buying guide: is it right for your home?
- Carrier 2026 aircon buying guide: is it right for your home?
- PRISM+ 2026 buying guide: is it right for your home?
- Best aircon brand in Singapore: how to actually compare
- Aircon tick rating: what 5 ticks actually means
- Bigger aircon or second unit: which is smarter?
- 5 things to check before buying an aircon in Singapore
- 7 aircon checks before buying a resale HDB flat
- 5 mistakes when choosing an aircon for your HDB
- Climate Voucher for aircon: who qualifies and for what
- Centralised cooling in Tengah: how it differs from splits
- How ducted aircon systems work: one unit feeding every room
- How an aircon cools a room: the refrigeration cycle
- Specialty aircon filters: catechin, nano, and plasma claims
- Starmex single split vs multi split: which family fits?
- Panasonic aircon lines compared: which of the four fits?
- Daikin wall-mounted families compared: which one fits?
- Daikin vs Panasonic aircon: what actually decides it
- Mitsubishi vs Panasonic aircon: what the price gap buys
- Best aircon for an HDB flat: sizing, system type, and order
- How we evaluate aircon brands: what counts as verified
- Portable and casement aircon vs split systems: which fits?
- Grey-import aircon: same model, different obligations
- Aircon smart home compatibility: the dependency you buy
- Lemon Law and a new aircon: the seller owes the remedy
- MEPS explained: the floor under every aircon sold here
- MELS explained: what the energy label is required to show
- Refrigerant GWP explained: a ratio, not a product rating
- Aircon cold draft: when the air lands in the wrong place
- COP explained: the ratio every efficiency claim rests on
- CASE and CaseTrust: the association and the accreditation
- EER, SEER and CSPF: three scales that never line up
- HFC phase-down: the yearly quota on refrigerant imports
- Refrigerant ODP explained: the test every gas now passes
- Concealed ducted aircon: what the clean ceiling costs
- R290 refrigerant explained: propane and the charge limit
- Aircon IR blaster: what it imitates and what it misses
- Window aircon explained: the whole machine in one box
- Heat load calculation: the work behind a capacity figure
- Tuya aircon: many brand names, one platform underneath
- Coanda effect: why aircon air travels along the ceiling
- Heat pump explained: the aircon circuit run in reverse
Installation55 pages
- 5 things to know about HDB aircon permits and rules
- 5 things to confirm before your condo aircon installation
- Where can you put your aircon outdoor unit?
- Can you reuse aircon piping when replacing the system?
- 4 things to check at your new aircon installation handover
- What aircon installation actually costs in Singapore
- What your aircon installation quote may be missing
- Aircon warranty vs workmanship warranty: what's covered?
- 5 signs your aircon installation was done poorly
- Aircon vacuum and pressure test: what to ask installers
- Aircon trunking explained: what runs inside the casing
- Aircon licence Singapore: what is required and what is not
- HDB defects liability period: report before you renovate
- Aircon pipe run limits: how far the outdoor unit can sit
- Aircon drain gradient: why the fall must be continuous
- Aircon supply vs return grilles: which opening does what
- Aircon dampers: why balancing decides which room cools
- Ceiling void access: reaching the aircon you cannot see
- Aircon earthing: what it does and why it gets skipped
- Dedicated aircon power point: plan it before renovation
- Aircon copper pipe wall thickness and insulation class
- Aircon commissioning readings: the record nobody asks for
- After aircon installation: which noises are normal?
- 5 reasons your new aircon is not as cold as expected
- HDB aircon installation and drainage rules: what's required
- Planning BTO aircon: ledge, wiring, and what HDB requires
- 5 aircon decisions before an HDB HIP renovation
- 9 HDB aircon ledge problems that can damage a condenser
- 8 first-year BTO aircon faults the installer should check
- 6 situations where an aircon quote needs a site survey
- Condensate lift pump: what having one commits you to
- Core drilling for aircon: siting a hole you cannot undo
- Concealed vs exposed aircon piping: reaching it later
- Licensed Electrical Worker: when aircon work needs one
- Condenser clearance: the space that is part of the machine
- Aircon in a household shelter: the wall with its own rules
- Condenser stand vs wall bracket: where the load goes
- Flare vs brazed aircon joints: which one leaks first
- Aircon pipe insulation thickness: what keeps a run dry
- Moisture in the aircon circuit: what the install seals in
- Aircon isolator switch: safety for whoever opens the unit
- Micron gauge: turning an aircon evacuation into evidence
- False ceiling access panel: who decides where it goes
- Aircon throw: why a bigger unit does not reach further
- PUB's condensate rule: where aircon water is allowed to go
- BCA trained installer: who may mount your outdoor unit
- Aircon soft starter: an inverter unit already has one
- Aircon flare nut torque: too loose and too tight leak
- Static pressure: the number that decides a ducted install
- Aircon height difference: which unit sits higher matters
- Aircon cable size: the decision buried behind the wall
- R32 minimum floor area: why mounting height changes it
- Outdoor unit covers and canopies: when a shelter helps
- Aircon diffuser: what the fitting in the ceiling decides
- Aircon plenum box: the one part that gets made on site
Brand owners15 pages
- Daikin aircon owner's guide: codes, parts and repair
- Mitsubishi Electric aircon owner's guide: codes and repair
- Panasonic aircon owner's guide: models, faults, repairs
- Midea aircon owner's guide: faults, parts and repair calls
- LG aircon owner's guide: faults, parts and warranty
- Samsung aircon owner's guide: models, faults, repairs
- Hitachi aircon owner's guide: faults, parts and warranty
- Toshiba aircon owner's guide: faults and the parts wait
- Fujitsu aircon owner's guide: faults, parts and warranty
- Mitsubishi Heavy aircon owner's guide: codes and repair
- Carrier aircon owner's guide: faults and repair paths
- EuropAce aircon owner's guide: faults and repair calls
- Sharp aircon owner's guide: faults, parts and repair
- York aircon owner's guide: faults and parts sourcing
- PRISM+ aircon owner's guide: faults, cover, what to send
Electricity15 pages
- How to reduce your aircon electricity bill
- 7 reasons your aircon electricity bill spiked
- How much it costs to run your aircon per hour in Singapore
- Cooling kW vs power kW: the two numbers on a spec sheet
- Aircon dry mode vs cool mode: which should you use?
- Aircon sleep mode vs auto mode: which to use at night?
- Aircon timer vs manual off: which saves more electricity?
- Ceiling fan with aircon: does it save electricity?
- Dehumidifier vs aircon dry mode: which is better?
- How aircon and solar power interact in a Singapore home
- Open Electricity Market: what it does to an aircon bill
- U-Save rebates: a credit, not a change in aircon usage
- Regulated electricity tariff: why a bill moves on its own
- Aircon standby power: what stays on when you switch off
- Carbon tax on electricity: why aircon is the real exposure
Landlord15 pages
- Who pays for rental aircon: landlord or tenant?
- What a tenancy agreement's aircon clause should cover
- How to plan aircon servicing for rental units
- Should you service aircon before tenant handover?
- 7 aircon records landlords should keep between tenancies
- What an MCST is and what it can say about your aircon
- Fair wear and tear: the line an aircon dispute turns on
- Condo defects liability period and late aircon faults
- Aircon ledge: common property or part of your own lot
- Condenser on common property: approval before, not after
- Small Claims Tribunals: where an aircon dispute fits
- Condo by-laws: which aircon clauses to go looking for
- When an aircon complaint becomes a neighbour dispute
- Managing agent: who decides, and who is only relaying it
- Strata Titles Boards: the disputes they were built for
Business & commercial49 pages
- Commercial aircon servicing: how it differs from a home
- What factory and workshop air does to an aircon unit
- Why commercial aircon faults follow the trading day
- VRF and VRV aircon: between a multi-split and a chiller
- Chilled water aircon: when the cold is made elsewhere
- Office aircon: why a workplace is never evenly cool
- Aircon servicing for restaurants and F&B outlets
- Why kitchen grease needs an overhaul, not another wash
- Planned vs reactive aircon maintenance: the real cost
- Keeping serviced-apartment aircon guest-ready
- Aircon maintenance for condo common areas in Singapore
- EEG grant for aircon: what your business can actually claim
- 7 ceiling-cassette aircon faults in offices and condos
- 7 aircon checks at office fit-out handover
- 6 aircon service report fields facilities managers need
- 6 aircon risks to check before opening an F&B premises
- Three-phase power for aircon: what the premises allows
- Boundary noise limits and where a condenser sits in them
- Aircon contractor insurance: who carries the risk on site
- Aircon work at heights: who plans the reach to a ledge
- Legionella and aircon: which equipment carries the risk
- Air changes per hour: the measure cooling does not give
- bizSAFE explained: why the level matters more than the logo
- SS 553: the ACMV code a fit-out design is measured against
- Aircon crankcase heater: why the oil has to stay warm
- AHU vs FCU: which box brings outside air into a space
- PAU explained: why outdoor air gets a machine of its own
- Green Mark explained: the rating sits on the building
- Cooling tower registration: the duty follows the premises
- Condenser on a conserved shophouse: a planning matter
- Why shophouse aircon faults trace back to the retrofit
- District cooling: what changes when cooling is piped in
- Ceiling suspended aircon: the format that needs no void
- Aircon central controller: the panel that holds the record
- ACMV noise survey: the measurement a TOP application needs
- Packaged aircon explained: the word names two machines
- BCA workhead ME01: what a contractor's grade limits
- Indoor CO2 explained: the number that tracks ventilation
- SS 554: which parts of the IAQ code bind, and which advise
- R454B refrigerant explained: the blend that replaces R410A
- GST on aircon work in Singapore: how to read a quote
- Floor-standing aircon: cooling that starts at the floor
- Dual inverter aircon: what the name does not tell you
- Aircon CFM: what the airflow figure on a spec sheet assumes
- CADR ratings: what the clean air figure counts and assumes
- Plasmacluster: what Sharp's ions do, and who tested it
- Inverter capacity range: why the minimum matters most
- Aircon motion sensor: what it detects and what it misses
- Aircon tonnage: an exact unit, and who actually uses it
Seasonal & situational26 pages
- Aircon during the haze season: what it can and can't do
- Should you service your aircon before haze season hits?
- Your outdoor unit still breathes haze with the windows shut
- Built-in air purifier during haze: what it actually does
- What PM2.5 is, and what your aircon filter does about it
- Does an aircon bring in fresh air? What it recirculates
- Indoor relative humidity: the target for a Singapore home
- Aircon faults during the monsoon: what's normal, what's not
- Aircon for a baby's room: settings, airflow, and air quality
- Aircon care for a home left empty for weeks
- Aircon for elderly or those with health needs
- Does room temperature affect focus when working from home?
- Aircon, mould, and dust mites: what triggers allergies
- Bedroom temperature and sleep quality: what disrupts sleep
- Dogs, cats, and heat: why breed changes the aircon setup
- Why the same temperature feels different room to room
- Sumatra squalls: the aircon faults nobody can reproduce
- PSI bands explained: what the index covers and misses
- Wet-bulb temperature: the ceiling on evaporative cooling
- HEPA filters and aircon: why a wall unit cannot carry one
- MERV ratings: a scale to sit on, not a ladder to climb
- Inter-monsoon weeks: when a working aircon looks faulty
- Air purifier vs aircon: what each machine was built for
- Heat stress advisory: an index for time spent outdoors
- Apparent temperature: the feels-like number is a model
- VOCs and aircon: what cooling does to a renovated flat
Decisions these guides can help with
2026 brand buying guides
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