AC not cooling upstairs: DIY fix or call a professional?« Back to Previous Page

Based on your description, this is a classic scenario we see daily in Dubai villas during peak summer. The combination of weak airflow from the vents and an unusually loud outdoor unit humming points directly to a compromised system, not just a simple settings issue.

The weak airflow upstairs strongly suggests a blockage in your ductwork or a failing blower motor. In our dusty environment, ducts get clogged with sand and debris, severely restricting air volume. The loud humming from the outdoor condenser, especially worse in the afternoon heat, indicates the compressor is overworking due to a potential refrigerant leak or a failing capacitor. Setting the thermostat to 18°C only forces the already struggling unit to run continuously, risking a complete compressor burnout—a very costly repair.

While you could check and replace the air filter yourself (a primary cause of weak flow), the symptoms you describe are beyond a simple DIY fix. Tampering with refrigerant gas requires an EPA-certified technician as per UAE regulations, and misdiagnosing the electrical components can be dangerous.

For a precise diagnosis, I strongly recommend a professional inspection. Our team uses thermal imaging and manometer pressure tests to pinpoint exactly whether the issue is duct-related, electrical, or a refrigerant leak. This saves you time and money on unnecessary parts replacements.

Call us at 800-MOLDS (800-66537) or email hello@saniservice.com for an immediate assessment. We'll get your upstairs cool again and prevent a total system failure during the worst of the heat.