The Customer's Situation
Puan Zuraidah lives in a double-storey terrace house in Taman Kajang Perdana, Kajang. Her living room Midea 1.5HP aircond suddenly stopped responding to the remote control. She'd already replaced the batteries, bought a new universal remote from Mr. DIY, and tried the emergency button on the unit — nothing worked.
The aircond was completely dead — no standby light, no beep, no response. She checked the MCB and it wasn't tripped. Power to the socket was fine (she tested by plugging in a fan). The aircond was 4 years old and had been working perfectly until the day before.
Reported Issues
- Aircond completely unresponsive — no standby light, no beep
- New batteries and universal remote already tried — no change
- Emergency button on unit produces no response
- MCB not tripped, power socket confirmed working
- 4-year-old Midea 1.5HP wall-mounted unit
Our Diagnosis
Technician Amir arrived and confirmed the symptoms. With the unit powered on at the MCB but showing no signs of life, he opened the indoor unit to access the main PCB board.
Immediately, he spotted the issue — a small area of the PCB had visible burn marks near the power input section. A component (a capacitor on the power regulation circuit) had failed, likely from a power surge. This had knocked out the entire board, which is why the unit was completely dead.
Control board failures often trigger error codes on the unit's display. Understanding how to read aircond error codes can help you describe the fault accurately when contacting a technician.
As covered in our guide on aircond remote troubleshooting, when even the emergency button doesn't work and there's power to the unit, it's almost always a PCB issue.
Work Completed
- Opened indoor unit and inspected PCB board — found burned capacitor on power input section
- Replaced entire PCB board with compatible Midea replacement
- Tested all functions: remote control, temperature setting, fan speeds, timer, sleep mode
- Checked outdoor unit operation — compressor and fan running normally
- Recommended installing a surge protector for the aircond circuit
The Repair
Amir carried compatible Midea PCB boards in his service van (we stock common boards for popular brands). He replaced the board in about 45 minutes — removing the old board, connecting all the wiring harnesses to the new one, and configuring the DIP switches for the correct model.
After powering up, the standby light came on immediately. Remote control worked perfectly — all functions responded. He tested cooling mode for 20 minutes to verify the compressor engaged and the unit cooled normally.
What Caused the Failure?
Power surges are the most common cause of PCB board failure in Malaysia. These can come from lightning strikes (very common during Malaysia's thunderstorm season from March-November), TNB supply fluctuations, or even a faulty home wiring connection.
Amir recommended installing a surge protector on the aircond's power circuit. A dedicated surge protector for the DB board costs RM80-150 and can prevent thousands of ringgit in electronics damage across all connected appliances.
Cost Breakdown
- Midea PCB board (replacement part): RM260
- Labour (diagnosis, replacement, testing): RM120
- Total: RM380
Customer Feedback
"I thought the whole aircond was gone — completely dead. But it was just the circuit board. Amir had the right part in his van and fixed it in less than 2 hours. Saved me from buying a whole new unit. Also got the surge protector installed as he suggested."
— Puan Zuraidah, Taman Kajang Perdana
Aircond Completely Dead?
It might just be the control board — not the whole unit. Get a proper diagnosis before buying new.
Get Free Quote