Khamis Mushait experiences the harshest summer in Asir and Jazan. July and August temperatures regularly exceed 42°C and AC units run 12–16 hours daily without rest. This summer exposes faults in units that appeared fine all winter.
Why April and Not May or June
- June has high demand — longer waits and higher emergency rates
- April allows discovering and fixing any fault before 42°C arrives
- Better pricing compared to summer emergency requests
- Gas level verified before a shortfall becomes critical in peak heat
The Khamis Mushait Specific Checklist
1. The Capacitor — Top Priority
The capacitor is the component most vulnerable to failure in Khamis Mushait summer. 60–70% of summer faults start with a tired capacitor. Measuring its electrical capacitance value reveals early degradation before it fails completely in July.
2. Refrigerant Level
In winter, low refrigerant has minimal impact. In July at 42°C, the same shortfall means an AC that can't cool and runs continuously. Testing and topping up in April prevents worst-case summer scenarios.
3. Outdoor Condenser Coil Cleaning
A fouled coil makes the compressor work against elevated condensing pressure — accelerating its wear in extreme heat. Medium-pressure water cleaning restores most of the unit's performance.
4. Electrical Connection Check
Oxidised terminals create resistance that increases further at high temperatures. In July and August, this resistance heats connections and may cause shorts or fire.
5. Compressor Temperature Under Load
After 20–30 minutes of operation, measuring compressor temperature with a temperature gun confirms it is running within its safe range. A hot-running compressor in April will be a real problem in July.
Last summer, a main bedroom AC failed at 2pm with outdoor temperature at 41°C. Fault: burnt capacitor. We carried the correct replacement in our vehicle and swapped it in 35 minutes from arrival. The house was cool again before afternoon.