Are they open on Saturdays?

Google lists Saturday hours as 09:00-13:00, and Sunday as closed.

Koomax Engineering Pte Ltd

Updated 2026-11-15 · 2,731 reviewed · 637 listed · Scored from 31 Google reviews · How we rank ›

5.0(31) 84 composite score See reviews on Google ✓ Google-verified Publishes prices

24/7 Emergency Aircon RepairAircon InstallationGas Top-Up & Chemical CleaningAircon Maintenance ContractsAircon Servicing & RepairCommercial & Industrial Aircon

Location: Bishan, Singapore
Services: 24/7 Emergency Aircon Repair, Aircon Installation, Gas Top-Up & Chemical Cleaning
Reviews: 31
Best for: Homeowners and offices wanting punctual, tidy aircon servicing

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

What do recent reviews say?

Koomax Engineering earns a perfect 5 average from 31 Google reviews in Bishan. Reviewers consistently praise on-time technicians, careful floor and furniture protection, and fair pricing. Some also say the customer service staff replies quickly and keeps them updated.

Praised for

Punctual technicians
Thorough cleaning and servicing
Protects floors and furniture
Responsive admin and WhatsApp replies
Fair, transparent pricing

punctualresponsivefair-pricingskilled-techniciansclean-workmanshipprofessional-servicegood-after-sales-supporttidy-installation

Best for: Homeowners and offices wanting punctual, tidy aircon servicing

Think twice if: Reviews are all positive, but the sample is small and mostly about servicing and cleaning, not large commercial projects.

What are they good at?

Perfect 5-star rating from 31 Google reviews
Protects floors and furniture before work
Responsive customer service team
Handles VRV/VRF systems (per website)

Worth knowing

Technicians William and Francis named in reviews
Alice from customer service praised for quick replies
Promo price of $28 plus 9% GST per unit on their website
Website claims more than 18 years in operation
Reviewer says servicing took about 50 minutes for 3 units

What reviews say by service

Aircon Servicing & Repair: Reviewers praise thorough servicing, quick repair visits and clean finish.
Gas Top-Up & Chemical Cleaning: One reviewer praises a thorough chemical wash on two units.

How it compares

Rated 5 against a 4.58 average across the 137 24/7 emergency aircon repair businesses listed here.
Has more Google reviews than 68% of the businesses in this directory.

How we scored this

How We Rank

Star rating 85

Review volume 65

Review recency 100

Review sentiment 81

Profile completeness 100

Verification 30

Rating breakdown

FAQ

Are they open on Saturdays?: Google lists Saturday hours as 09:00-13:00, and Sunday as closed.

Contact

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

Last verified 2026-11-15

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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