In summer, a completely dead AC needs immediate attention. Before you call, try these quick checks — they may save you the wait.
Before Calling — Quick Self-Check
- Check the circuit breaker (AC fuse) in your electrical panel
- Confirm the power socket or supply cable is intact
- Try fresh batteries in the remote
- Try switching the AC on from the direct buttons on the indoor unit
On the hottest days (July–August) in Khamis Mushait, the electricity grid is under heavy load from collective peak demand. Your AC may not start due to low supply voltage rather than a unit fault. A voltmeter confirms this in seconds — our technicians check this first.
Most Common Technical Causes
PCB (Control Board) Failure
The most common cause after initial checks. PCBs fail due to voltage spikes. In Abha, voltage fluctuations are more frequent in higher-altitude districts further from the main grid infrastructure.
Capacitor Failure
The capacitor starts the motor. When it fails, the motor cannot start — you may hear a faint hum or nothing at all. In Jazan, coastal humidity accelerates capacitor corrosion and shortens service life.
Thermostat Fault
The thermostat sends the start signal to the unit. A faulty thermostat sends no signal. Key indicator: the AC was working and suddenly stopped at a specific temperature with no obvious cause.
A central AC in a Jazan commercial building stopped completely mid-working day. Inspection revealed a burnt capacitor from a power surge following a supply interruption and restoration. We replaced the capacitor and installed a surge protector. Unit was back online within 50 minutes.