AC making high-pitched noise, about to break down?« Back to Previous Page

Based on your description, this is a classic symptom we see in Dubai apartments during peak summer. That high-pitched whining noise, specifically under high load, typically points to one of two issues.

The most common culprit is a refrigerant leak. As the refrigerant level drops, the compressor has to work significantly harder and can produce a whining or screaming sound as it struggles to build pressure, especially on the hottest days when demand is highest. The second possibility is a failing compressor bearing. The intense, continuous operation in 45°C heat accelerates wear, and a worn bearing will emit a high-frequency whine just before seizing.

The critical difference between a simple service and an imminent breakdown is the compressor's condition. A service (topping up refrigerant, cleaning coils) is a preventative measure. A failing compressor is a catastrophic failure that requires a full replacement, which is costly and, under Dubai Municipality regulations, must be handled by a DEWA-certified technician for proper refrigerant handling and disposal.

Given the noise is isolated to one unit and occurs under high load, this is a serious warning sign. I strongly recommend you shut the unit off to prevent further damage and call for a professional inspection immediately. Our certified team can perform a pressure test and acoustic diagnostic to pinpoint the exact fault.

Call us at 800-MOLDS (800-66537) or email hello@saniservice.com to schedule an emergency assessment before a complete breakdown leaves you without cooling.