Aircon Case Studies
See what the complaint was, what the technician checked, and what actually fixed it.
Afternoon cutouts traced to blocked outdoor airflow
Aircon error after renovation traced to miswired signal cable
Aircon shuts off by itself traced to drifted thermistor, not PCB
Auto mode keeps turning off traced to faulty ambient temperature sensor
Breaker trips traced to isolator fault, not compressor short
Cassette cooling uneven, louver vane and airflow path at fault
Cassette not cooling traced to stuck expansion valve, not compressor failure
Cassette rattle traced to loose fan blade clip, not compressor bearing
Cassette uneven airflow traced to one-sided blower wheel buildup
Cassette water leak traced to blocked drain, not cracked pan
Cassette weak cooling traced to industrial dust coating on condenser coil
Ceiling unit drip after quarterly service traced to loose drain joint
Ceiling unit random shutdowns traced to loose terminal after renovation
Cold air but weak throw traced to blocked airflow path
Concealed unit dripping traced to seized condensate pump
Condo unit not cold traced to dirty evaporator, not low gas
Cooling drop after servicing traced to deep coil buildup
Cooling loss traced to condenser choked with leaf debris
Cooling loss traced to refrigerant leak, not just low gas
Dripping after filter cleaning traced to drain-trap seal loss
Ducted airflow loss traced to neglected return air filter in ceiling void
Ducted system airflow loss traced to return duct buildup, not duct damage
Ducted unit overflow traced to stuck condensate pump float, not pump failure
Ducted warm zone traced to stuck damper actuator, not duct damage
Error code after power surge cleared with PCB reset, not replacement
Error code after servicing cleared with PCB reset, not board replacement
Flashing light after renovation traced to disturbed signal wire
Frozen coil traced to restricted airflow, not evaporator fault
HDB unit not cold traced to salt-crusted condenser near the coast
HDB wall unit dripping traced to algae-choked drain tray
Hidden-unit overflow traced to stuck condensate pump float
Ice on pipe traced to airflow restriction, not just low gas
Indoor unit buzzing traced to loose mounting plate, not compressor
Indoor unit rattling traced to loose fan barrel, not motor bearing
Intermittent ceiling drip traced to concealed drain joint gap
Intermittent shutdown traced to drifted thermistor, not PCB fault
Intermittent trips traced to corroded isolator in industrial setting
Kitchen unit weak airflow traced to grease-loaded blower wheel
Landed ducted system weak airflow traced to neglected return air filter
Landed home drip traced to drain pipe gradient lost over time
Landed unit not cold traced to condenser choked with garden debris
Loud rattling in wall unit traced to worn motor bearing
Musty smell after general service traced to mould on evaporator coil
New BTO unit not cold traced to installer undercharge, not defective compressor
New condo aircon error traced to loose sensor wire, not faulty PCB
New install cooling issue traced to swapped control wires
New installation not cold due to undercharge at handover
New unit leak after first service traced to drain pan not reseated
No airflow traced to blower blockage, not fan motor
No airflow traced to burnt fan motor, not simple blockage
Not cold after servicing traced to partially closed valve
Not cold and high electricity bill traced to undersized outdoor unit
Not cooling traced to capacitor fault, not compressor failure
Office cassette not cooling traced to neglected filter, not low gas
One ducted zone warm due to jammed damper linkage
One room not cold traced to room-side restriction, not low gas
Outdoor noise at night traced to mounting vibration, not compressor
Outdoor unit dead, compressor failure confirmed after checks
Outdoor unit error traced to PCB fault after capacitor ruled out
Outdoor unit knocking at night traced to loose fan blade, not compressor
Outdoor unit not running traced to contactor relay fault
Rainy-day breaker trips traced to water ingress in switch box
Recurring cooling loss traced to hidden Schrader valve leak
Recurring gas loss traced to pinhole leak in concealed pipe run
Recurring gas loss traced to salt-corroded pipe joint at outdoor unit
Refrigerant top-up loop traced to leak at flare connection
Remote not working traced to receiver path, not indoor PCB
Repeat top-ups traced to leaking service valve core
Repeated gas loss traced to outdoor pipe-joint leak
Repeated gas loss traced to slow leak at flare joint
Shop unit drip traced to algae-blocked drain pipe, not internal leak
Shophouse cassette leak traced to drain line sludge, not cracked pan
Short cycling after servicing traced to displaced thermistor sensor
System-3 one zone warm due to indoor-side restriction
System-4 tripping traced to one indoor PCB fault
Told to replace unit, capacitor fix restored cooling
Two bedrooms losing cooling traced to indoor coil leak
Unit not starting traced to degraded capacitor, not outdoor unit failure
Wall unit dripping traced to blocked drain tray, not cracked housing
Wall unit leak after servicing traced to drain tray not reseated
Water leak after chemical wash traced to drain-path issue
Water leak in condo traced to drain line freezing in high-humidity rain
Weak airflow in cassette traced to corroded motor contacts
Weak airflow traced to dust buildup, not compressor fault
Worse after servicing traced to loose drain cover
See a similar situation? Let’s take a look.
Describe what’s happening. We’ll work out the likely cause and tell you the right next step.
WhatsApp us