AC Making Noise
After Service?
Rattling, buzzing, or grinding? Don't panic. Learn why your AC is noisy after maintenance and how to fix it quickly.
Why is My AC Noisy?
AC making loud noise after service is a common frustration for homeowners in Mysuru and Bangalore. You pay for maintenance to get peace of mind, not a headache.
While some minor sounds (like water gurgling) are normal immediately after service, persistent rattling or grinding often indicates loose parts, fan misalignment, or improper reassembly.
Normal vs. Danger Sounds
Not all post-service noises are bad. However, you need to know the difference to avoid costly damage.
What to look for:
- Normal: Slight hissing (gas flow) or soft air whooshing.
- Danger: Metal grinding, loud banging, or electrical buzzing.
- Common Cause: Technicians often forget to tighten the front panel screws, causing vibration.
5 Common Causes & Fixes
Identify the source of the noise from these common culprits.
1. Loose Screws/Panels
The Sound: Rattling or vibrating.
The Fix: Check the outer body. If panels were removed for cleaning, they might not be screwed back tightly.
2. Fan Motor Issues
The Sound: Grinding or squealing.
The Fix: Misaligned blades hit the casing. This needs immediate professional realignment.
3. Electrical Buzzing
The Sound: Constant hum or buzz.
The Fix: Could be a loose wire or failing capacitor. Do not touch. Call a technician.
4. Refrigerant Hissing
The Sound: Hissing or bubbling.
The Fix: Usually normal for 1-2 hours after gas filling. If it persists, there is a leak.
5. Debris Obstruction
The Sound: Clanking or clicking.
The Fix: A leaf or twig might have fallen into the outdoor unit fan. Turn off AC and inspect.
6. Quick DIY Check
Before calling help: Turn off the AC. Press your hand firmly against the front panel. If noise stops, it's just a loose panel screw.
Prevent Future Noise
Choose the Right Service: Cheap local technicians often skip the "post-service check." Always hire certified professionals who test the unit for noise before leaving.
Aspire Appliance Services guarantees a Noise-Free Test Run after every service visit.
Maintenance Tips
Service Schedule
- Service every 6-12 months.
- Clean filters monthly to prevent strain on the motor.
- Check outdoor unit stability.
Don'ts
- Do not ignore grinding sounds.
- Do not use non-standard spare parts.
- Do not open the outdoor unit yourself.
Frequently Asked Questions
Is it safe to use an AC making loud noise?
Minor rattling is annoying but safe. However, grinding or electrical buzzing indicates a serious fault. Switch it off immediately.
How long does post-service noise last?
Water gurgling or slight hissing should stop within a few hours. Mechanical banging will not stop on its own.
Can I fix the noise myself?
You can tighten external screws or clean the filter. Never touch internal wiring or the fan motor.
Why is my AC vibrating?
Vibration is usually caused by an unbalanced fan blade or the outdoor unit not being mounted on a level surface.
Need a Quiet AC Service?
Aspire Appliance Services ensures silent, efficient cooling for Mysuru & Bangalore homes.
CALL EXPERTS: 9066472722