Why is the unit making unusual noise?
Unusual noise from an HVAC or air conditioning unit often indicates loose components, airflow obstruction, or mechanical imbalance. Addressing noise early helps prevent damage and maintain comfort. Here are the most common causes and solutions:
1. Loose or vibrating components
Rattling or metallic noises usually mean loose screws, panels, or fan blades. Turn off the unit and check if the front panel, air outlet grille, or mounting brackets are secure. Tighten any loose parts and make sure the unit is firmly installed on a stable surface.
2. Foreign objects in the fan or duct
If you hear clicking, tapping, or scraping sounds, debris such as plastic, paper, or leaves may be caught in the fan wheel or duct. Remove the front cover carefully and inspect the blower and outlet for obstructions. Always power off the unit before cleaning.
3. Imbalanced or damaged fan blades
A buzzing or wobbling sound might mean the fan blades are imbalanced or bent, causing vibration during rotation. Stop the system and inspect the blades. Clean off dust buildup and, if damaged, contact Aurashu service for replacement.
4. Airflow restriction or dirty filters
Whistling or hissing noises can result from clogged air filters or blocked vents. Clean or replace filters and make sure supply and return grilles are not obstructed by furniture or curtains.
5. Loose refrigerant piping or vibration transmission
If a low-frequency humming is present, it might come from refrigerant pipes vibrating against walls or brackets. Add insulation or reposition pipes to reduce contact and resonance.
6. Expansion or contraction of materials
When metal components heat up or cool down, minor popping or ticking noises can occur—this is generally normal. If such sounds increase in intensity or frequency, schedule a checkup.
7. Compressor or motor issues
A loud grinding, squealing, or buzzing could indicate motor bearing wear, fan motor imbalance, or compressor malfunction. In such cases, turn off the system immediately and contact Aurashu’s professional service team to avoid further damage.
8. Regular maintenance
Perform regular inspection, tightening, and cleaning to prevent most noise-related problems. Annual maintenance helps identify early mechanical wear and ensures long-term quiet operation.
If the noise persists after these steps, record the sound type and duration, then contact Aurashu technical support. Our specialists will guide you through advanced diagnostics or arrange on-site assistance to restore optimal performance.
