How quickly can you respond to a broken aircon?

Koomax handled an emergency repair the same day; the technician arrived on time and fixed the issue on the first try.

Do you charge extra for follow-up visits if there's a problem after servicing?

No. Reviewers reported the team returned the very next day without hesitation or added cost to fix issues discovered after service.

What is the cost of a basic aircon service?

Their website lists a promo price of $28 plus 9% GST per unit for aircon servicing. Reviewers confirmed no hidden charges added.

Koomax Engineering Pte Ltd

Updated 2026-09-15 · 2,661 reviewed · 598 listed · Scored from 29 Google reviews · How we rank ›

5.0(29) 84 composite score See reviews on Google ✓ Google-verified Publishes prices

Aircon Maintenance Contracts24/7 Emergency Aircon RepairAircon Servicing & RepairGas Top-Up & Chemical CleaningAircon InstallationCommercial & Industrial Aircon

Location: Bishan, Singapore
Services: Aircon Maintenance Contracts, 24/7 Emergency Aircon Repair, Aircon Servicing & Repair
Reviews: 29
Ranking: #97 in Aircon Maintenance Contracts
Best for: Homeowners wanting same-day repairs and honest advice without pressure to overspend.

Business data from Google Business Profile, checked 2026-09-15. Facts from the business's own website were fetched 2026-08-11.

What do recent reviews say?

Koomax delivers emergency repairs the same day and handles regular servicing with no shortcuts. Staff like William, Francis, and Alice show up on time, explain work clearly, and return immediately if issues arise after the job. Reviewers consistently praise transparent pricing, thorough cleaning, and genuine after-sales commitment over years of reliable service.

Praised for

punctual arrival and quick response
thorough, professional workmanship
no hidden charges or upselling
responsive customer service and follow-up
experienced team builds confidence

punctualresponsivefair-pricingskilled-techniciansreliable-warrantyclean-workmanshipquick-responsetidy-installationhonest-quotesprofessional-servicegood-after-sales-support

Best for: Homeowners wanting same-day repairs and honest advice without pressure to overspend.

What are they good at?

Same-day emergency repair response
No hidden charges or pressure to buy unnecessary work
Returns immediately if issues surface after service
Named technicians and responsive admin team

Worth knowing

Named technicians: William, Francis, Alice (customer service); promo price $28 + 9% GST per unit for single service
Fast booking and friendly appointment reminders
Teams arrive early and complete jobs efficiently (e.g. 3 units serviced in 50 minutes)
Return next day to fix any issues found after service
Thorough cleaning includes floor work and furniture protection

What reviews say by service

Aircon Servicing & Repair: Thorough wash and chemical clean leave units running much colder; technicians explain work clearly and don't cut corners even at promo prices.
24/7 Emergency Aircon Repair: Emergency repairs handled same day; technician arrived on time and fixed issue first try.
Gas Top-Up & Chemical Cleaning: Chemical wash described as remarkable; thorough cleaning resolves problems previous companies left unresolved.
Aircon Maintenance Contracts: Customers using regularly over years report zero aircon issues after switching to Koomax; sound technical advice valued.
Aircon Installation: Review mentions installation but no specific praise or complaint in text.
Commercial & Industrial Aircon: Limited review evidence for this category.

How it compares

Rated 5 against a 4.62 average across the 250 aircon maintenance contracts businesses listed here.
Has more Google reviews than 66% of the businesses in this directory.

How we scored this

How We Rank

Star rating 85

Review volume 64

Review recency 100

Review sentiment 81

Profile completeness 100

Verification 30

Rating breakdown

FAQ

How quickly can you respond to a broken aircon?: Koomax handled an emergency repair the same day; the technician arrived on time and fixed the issue on the first try.
Do you charge extra for follow-up visits if there's a problem after servicing?: No. Reviewers reported the team returned the very next day without hesitation or added cost to fix issues discovered after service.
What is the cost of a basic aircon service?: Their website lists a promo price of $28 plus 9% GST per unit for aircon servicing. Reviewers confirmed no hidden charges added.

Contact

Address: 28 Sin Ming Dr, #01-153, Singapore 575702
Open in Google Maps

Last verified 2026-09-15

Opening hours

Monday: 09:00-18:00
Tuesday: 09:00-18:00
Wednesday: 09:00-18:00
Thursday: 09:00-18:00
Friday: 09:00-18:00
Saturday: 09:00-13:00
Sunday: Closed

As listed on Google.

From their website

Services listed

Aircon ServiceAircon RepairAircon InstallationTroubleshooting of air-conditioning systemsVRV/VRF air-conditioning systemsAir leak pressure testingPCB ReplacementGeneral Cleaning

Published prices

Aircon Service (1 unit): $28 plus 9% GST (promo price)

Operating:more than 18 years

As published by the business on its own website; not independently verified.

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