Power & Electrical Cases
Real cases of aircon electrical faults — breaker trips, error codes, PCB failures, and startup issues.
Power and Electrical Problems We Have Diagnosed
Electrical faults range from a tripped isolator switch to a failed PCB or compressor drawing excessive current. The symptom — unit won't start, keeps shutting off, or throws an error code — rarely points directly to the failed component without testing.
These cases walk through how we traced each electrical fault from symptom to root cause, and why the first assumption was often wrong.
All Cases
31 real faults we diagnosed and resolved on site.
Aircon Auto Mode Shutting Off, Faulty Sensor
Jurong East · HDB · Daikin
Aircon Breaker Trips During Rain
Changi · Landed · Mitsubishi Electric
Aircon Breaker Trips, Short Circuit Found
Toa Payoh · HDB · LG
Aircon Capacitor Fix Saved Full Replacement
Fernvale · HDB · Samsung
Aircon Ceiling Unit Shutdown, Loose Terminal
Singapore River · Office · Daikin
Aircon Compressor vs Capacitor Failure
Jurong West · HDB · Panasonic
Aircon Corroded Isolator Tripping Unit
Sungei Kadut · Industrial · Panasonic
Aircon Daikin U4 PCB Failure, Lightning Surge
Pasir Ris · HDB · Daikin
Aircon Error After Power Surge, PCB Reset
Tuas · Industrial · Panasonic
Aircon Error After Servicing, PCB Reset
Marina East · Condo · Samsung
Aircon Error, Loose Sensor Wire
Bidadari · Condo · Daikin
Aircon Flashing Light After Renovation
Serangoon · HDB · Mitsubishi Electric
Aircon LG CH05 Communication Error, Corroded Terminal
Ang Mo Kio · HDB · LG
Aircon LG CH05 Outdoor PCB Failure, System-4
Tampines · Condo · LG
Aircon Mitsubishi E6 Corroded Junction Box
Yishun · HDB · Mitsubishi Electric
Aircon Mitsubishi E6 Drain Pump Interference
Bishan · Condo · Mitsubishi Electric
Aircon Mitsubishi E7 Starmex Board Failure
Punggol · HDB · Mitsubishi Electric
Aircon Not Starting Capacitor Fix
Outram · HDB · LG
Aircon Outdoor Unit Not Running
Punggol · HDB · Daikin
Aircon Panasonic H11 Communication Error, Loose Terminal
Bedok · HDB · Panasonic
Aircon Panasonic H11 Outdoor PCB Failure
Hougang · Condo · Panasonic
Aircon PCB Fault, Not Capacitor
Jurong East · HDB · Mitsubishi Heavy Industries
Aircon Post-Renovation Error, Miswired Cable
Tengah · HDB · Daikin
Aircon Remote Fault, Outdoor PCB Issue
Pasir Ris · HDB · Sharp
Aircon Samsung E1 Communication Error, Damaged Cable
Jurong West · HDB · Samsung
Aircon Samsung E1 Indoor PCB Relay Failure
Sengkang · Condo · Samsung
Aircon Sharp Error 7-0 Capacitor, Not Compressor
Bedok · Condo · Sharp
Aircon Shutdown, Thermistor Drift
Cashew · Condo · Mitsubishi Electric
Aircon System-4 Indoor Fault Trips Outdoor
Buona Vista · Condo · Midea
Aircon Thermistor Fault, Not PCB
Siglap · Landed · Mitsubishi Electric
Aircon York E1 Communication Error, Corroded Terminal
Jurong East · HDB · York