# Noisy Aircon Repair Serangoon from S$60 | Fixed Quote > Noisy aircon in Serangoon? We trace rattling, buzzing, clicking or grinding in the indoor or outdoor unit and repair it. From S$60, fixed quote, 90-day warranty. URL: https://airconservicingserangoon.com/noisy-aircon-repair/ Serangoon - Fixed Quote First # Noisy Aircon Repair in Serangoon: Rattles, Buzzing and Grinding Fixed Last updated: 11 November 2026 Finds the source of rattling, buzzing or grinding in the indoor or outdoor unit and repairs it. - No callout fee - Pay after the job - 90-day warranty WhatsApp for a Fixed Quote [https://wa.me/6594273833 →](https://wa.me/6594273833) See Prices [#pricing →](#pricing) Or call +65 9427 3833 [tel:+6594273833 →](tel:+6594273833) | Mon-Sat 9am-9pm, Sun 9am-8pm ![Technician checking an outdoor aircon unit on an HDB ledge for the source of a rattling noise](/images/misc/technician-listening-to-outdoor-aircon-condenser-o.webp) 90-Day Workmanship Warranty Price From S$60 2007 Serving Singapore Since 4,560+ Units Serviced 90-Day Workmanship Warranty 7 Days Until 9pm Mon-Sat Cool Earth Aircon: 4.0 on Google (66 reviews) | 380+ jobs a month across Cool Earth Aircon ## Why Is My Aircon So Noisy? Is your aircon keeping you up at night with a rattle you can’t place? Every aircon noise has a cause. A **rattling cover**, a buzzing outdoor unit, clicking at start-up, a grinding fan or loud vibration on the **aircon ledge** each point to a different fault. Brian started Cool Earth Aircon in 2007 as a one-man workshop, and our Serangoon team still diagnoses noisy aircon repair jobs the same way. The technician listens first, then checks the indoor and outdoor units. You get the cause and a quote before we fix anything. Repairs start from **S$60**, with any parts quoted upfront, and carry our **90-day workmanship warranty**. **Some noises are urgent.** Switch the unit off at once and keep it off until we check it if you hear or smell any of these: - Grinding or scraping - Loud banging - A burning smell ## Noise to Cause: What You Hear and What It Usually Means Here’s a quick cheat sheet. Match the sound to the table, and you’ll often know what we’re likely to find before we arrive. | Noise | Where | Usual cause | | --- | --- | --- | | Rattling | Indoor unit | Loose front cover, panel or louvre clip | | Rattling or vibration | Outdoor unit | Loose mounting bracket, worn vibration pads | | Buzzing or humming | Outdoor unit | Weak capacitor, contactor or wiring fault | | Clicking at start-up | Indoor or outdoor | Relay or electrical fault | | Grinding or scraping | Either | Worn fan motor bearing, blower wheel rubbing | | Whooshing or wobble hum | Indoor unit | Dirty, unbalanced blower wheel | | Rising hum after start-up | Outdoor unit | Normal inverter ramp-up, unless it rattles | Take a short video with sound before you WhatsApp us. It helps the technician come prepared with the right parts. ## Common Problems We Solve Most of the calls we get from Serangoon Central and Serangoon North flats fall into five groups. Two to four wall-mounted units means a few more places for a noise to start, so it helps to know which one is yours. ### A rattling indoor unit at night Night is when you notice it most. Often the front cover or a louvre clip has loosened after cleaning. It’s a small fix, done in minutes. ### An outdoor unit shaking on the ledge HDB aircon ledges are concrete, so a loose unit shakes loudly against them. We tighten the bracket and fit new vibration pads so the **condenser fan** runs quietly. Rubber pads harden with age, and hardened pads stop absorbing vibration. Other Singapore aircon firms, such as Uncle 7 Aircon, list this as a common cause of heavy outdoor humming on HDB ledges. ### Grinding from the fan A worn bearing in the fan motor grinds before it fails. Replacing the motor early stops a breakdown on a hot night. We quote the part before we replace it. ### A hum from a dirty blower wheel When mould and dust build up unevenly on the blower wheel, it spins off balance and hums. Cleaning it in a chemical overhaul [/chemical-overhaul/ →](/chemical-overhaul/) brings it back into balance. ### A buzzing compressor Buzzing from the outdoor unit when the **compressor** tries to start can mean a weak capacitor. Snowflake Aircon describes a classic pattern: a buzz, then a click, then silence. Left alone, it can stop the unit from starting. Please don’t open the outdoor casing yourself, as the capacitor holds a charge. See aircon repair [/aircon-repair/ →](/aircon-repair/) for other electrical faults. ## Noise Normal vs Noise Not Normal Some sounds are part of normal running. Here’s what we’d happily leave alone: - A soft click as plastic warms up - A gentle hum from the fan - The rise in sound as an inverter speeds up after start-up - A single click when the unit starts or stops For a rough guide, Xool Aircon Experts puts a healthy outdoor unit at about 45 to 55 dB, similar to a moderate conversation. Continuous clicking is different. A 2026 guide from Aircons.sg says it points to an electrical fault rather than normal relay action. New noises, louder noises and noises that change pitch are the ones to get checked early, while they are still cheap to fix. Send us a short video on WhatsApp, and we’ll tell you what we think it is and book a technician for your Serangoon flat. Published Prices ## How Much Does Noisy Aircon Cost in Serangoon? From S$60. Parts quoted separately if needed. No callout fee for Serangoon. Pay after the job. Noisy Aircon Repair From S$60 per repair - Fixed quote first - No callout fee - 90-day warranty WhatsApp for a Fixed Quote [https://wa.me/6594273833 →](https://wa.me/6594273833) Compare every service on our full aircon price list [/aircon-servicing-price/ →](/aircon-servicing-price/) . Why Choose Us ## Why Choose Aircon Servicing Serangoon for Noisy Aircon? ### We Find the Source Indoor or outdoor, fan or compressor. Each noise points to a different fault. ### Small Fixes Stay Small Many noises are a loose cover or bracket. We fix those without selling you parts. ### Fixed Quote First From S$60, with parts quoted upfront. No callout fee for Serangoon. ### Evening Slots Noise is worst at night. We work until 9pm Mon-Sat so you can book after work. ### 90-Day Warranty If the same noise returns within 90 days, we fix it at no extra charge. The Process ## How Does Noisy Aircon Work? The technician confirms the work and the price with you before starting. You pay after the job. 1. 1 ### Record the Noise Take a short video with sound. Note if it comes from inside or outside, and when it happens. 2. 2 ### WhatsApp Us Send the video and your Serangoon address. If you hear grinding or smell burning, switch off now. 3. 3 ### Listen and Check The technician runs the unit, finds the source and explains the fault in plain words. 4. 4 ### Quote and Fix Fixed quote before any work, parts included. Then we fix, test and you pay after. ## Not sure if you need a service, a wash or a repair? Tell us what the unit is doing. We will tell you what it probably needs and give you a fixed quote before anyone picks up a tool. WhatsApp Us [https://wa.me/6594273833 →](https://wa.me/6594273833) +65 9427 3833 [tel:+6594273833 →](tel:+6594273833) On the Job ## Noise Repairs We Handle Click any photo to see it larger. Reviews ## What Serangoon Customers Say Cool Earth Aircon: 4.0 on Google (66 reviews). We are part of Cool Earth Aircon, servicing Singapore homes since 2007. **4.0** on Google (66 reviews, Cool Earth Aircon) > "Told me the price on WhatsApp before coming. Serviced 3 units in our Serangoon Central flat, cleaned up after and tested each one. No extra charges." M Mei Ling T. Serangoon Central > "Bedroom unit kept leaking onto the wall. The technician cleared a choked drain line and showed me the sludge. No more dripping since." R Ravi K. Serangoon North > "Had a chemical overhaul on two old units in our Serangoon Garden house. The sour smell is gone and the rooms cool much faster." D Daniel O. Serangoon Garden Got Questions? ## Noisy Aircon FAQs ### Why is my aircon making a loud noise? Each noise points to a different cause. A rattle is often a loose cover, panel or bracket. Buzzing from the outdoor unit can be a capacitor or electrical fault. Clicking at start-up may be a relay. Grinding usually means a worn fan motor bearing or a blower wheel rubbing. ### Is a noisy aircon dangerous? Some noises are urgent. Grinding, loud banging or a burning smell mean switch the unit off now. A light rattle is usually safe but should be fixed before it loosens further. ### How much does noisy aircon repair cost? Repairs start from S$60. If a part such as a fan motor needs replacing, it is quoted separately before any work, so the price is fixed before we start. ### Why does my outdoor unit vibrate on the aircon ledge? Worn or missing vibration pads, loose mounting bolts or a rusted bracket let the unit shake against the ledge. Tightening the mounting and fitting new pads usually stops it. ### Why does my inverter aircon get louder after start-up? Inverter units ramp up speed after start-up to cool the room quickly, so some rise in sound is normal. A new rattle, buzz or grinding during ramp-up is not, and should be checked. ### My indoor unit makes a clicking sound. Is that normal? Soft clicks as plastic parts expand and contract are normal. Loud, repeated clicks at start-up can point to a relay or electrical fault and are worth checking. ### Can dirt make an aircon noisy? Yes. A caked blower wheel can become unbalanced and wobble, which causes a hum or vibration. A chemical wash or overhaul often fixes it. ### Can you come in the evening? Yes. We work until 9pm Monday to Saturday and until 8pm on Sunday. ### Still have a question? Send us a WhatsApp with your units and the problem. We reply with a fixed quote. Chat on WhatsApp [https://wa.me/6594273833 →](https://wa.me/6594273833) ## Related Services ### Aircon Repair Diagnosis and repair for breakdowns of all kinds, with same-day emergency slots, for all common brands, inverter and non-inverter. From S$60 View service [Aircon Repair →](/aircon-repair/) ### Aircon Chemical Overhaul The indoor unit is taken apart and each part is cleaned, checked for wear and rebuilt, for heavy mould, strong smells and long-neglected units. S$130-S$180 per unit View service [Aircon Chemical Overhaul →](/chemical-overhaul/) Same-day slots in Serangoon, subject to availability ## Ready to Book Noisy Aircon? Send your units, the problem and your Serangoon address. We reply with a fixed quote for noisy aircon repair. No callout fee, 90-day workmanship warranty. WhatsApp (fastest reply) +65 9427 3833 [https://wa.me/6594273833 →](https://wa.me/6594273833) Call us +65 9427 3833 or +65 6810 6706 [tel:+6594273833 →](tel:+6594273833) Open 7 days Mon-Sat 9am-9pm, Sun 9am-8pm WhatsApp for a Fixed Quote [https://wa.me/6594273833 →](https://wa.me/6594273833) See All Prices [/aircon-servicing-price/ →](/aircon-servicing-price/) - Fixed quote first - No callout fee - Pay after the job - 90-day workmanship warranty