# Koomax Engineering Pte Ltd

Listed under Aircon servicing on Honestfix: https://honestfix.sg/aircon-servicing

- Honestfix score: 100 out of 100 (for aircon servicing)
- Badges: WhatsApp, Active, Licence matched
- Google: 5 stars from 29 reviews
- WhatsApp: https://wa.me/6562300218
- Phone: +6562300218
- Website: https://koomax.com.sg
- Registered business: Koomax Engineering Pte. Ltd. · UEN 201925044H · since 2019
- Checked: 20 Sep 2026

## Summary

Reviews describe general servicing, repairs and installs, with William and his team named for thorough work, and admin staff who answer WhatsApp quickly. Of 26 written reviews, 11 say they used the business again, 9 say the problem was fixed, 6 say it came quickly and 1 knew the price first. Message on WhatsApp, ask the price per unit, and expect the team to return if something is off after servicing.

## What the badges mean

- WhatsApp: Has a WhatsApp number you can message directly.
- Active: Runs Google search ads or ranks in Google's first pages for this trade.
- Licence matched: An exact, currently valid match on a public register: ACRA, BCA, HDB or NEA.

## What customers say

- 11 of 26 reviews used them again
- 9 of 26 reviews say the problem was fixed
- 6 of 26 reviews say they came quickly
- 1 of 26 reviews knew the price first

## Jobs with evidence

- General servicing: customers mention (8 reviews)
- Repair: customers mention (4 reviews)
- Installation: customers mention (4 reviews)
- Chemical wash: customers mention (1 review)
- Chemical overhaul: customers mention (1 review)

## Latest Google reviews (10 of 26 held with text)

- 5 stars, 2 Sep 2026: Excellent service from Koomax Engineering. William and his team did a fantastic job carrying out a very thorough chemical wash on both of my air-conditioning units. They took the time to properly inspect and clean the systems rather than rushing through the job, and the difference afterwards was remarkable — both units are now cooling and running like new again. I had previously tried several other aircon companies without fully resolving the issues, so I’m really glad I finally found Koomax. They were knowledgeable, honest, reliable and professional, and I never felt that they were trying to 
- 5 stars, 29 Jun 2026: I had a great experience with Koomax and would highly recommend them to anyone looking for reliable air conditioning servicing. What impressed me the most was the professionalism and sense of responsibility shown by their team. ( William and Francis ) After completing the servicing, I noticed a small issue and contacted them. Without any hesitation, they arranged for their technicians to return and rectify the problem. Everything was resolved promptly and completely hassle-free. This level of after-sales service is something I rarely experienced with previous air-con servicing companies.Their 
- 5 stars, 8 Jun 2026: Super Service and fast reply!
- 5 stars, 9 May 2026: Best experience with their aircon services. Fast and they ensured that my furnitures are all covered.
- 5 stars, 8 May 2026: Koomax Air Service has a really wonderful team — very professional, friendly, and easy to deal with. The admin team replies to WhatsApp messages quickly and effectively, making communication smooth and hassle-free. The technicians who come for the servicing are friendly, cheerful people who are also very professional in their work. I did a regular aircon servicing one week back, and despite regular cleaning, when some issues came up afterward, the team came the very next day and addressed everything quickly and promptly. Very happy with their professional, reliable, and approachable service. K
- 5 stars, 25 Nov 2025: Best aircon service ever Koomax Engineering Pte Ltd, handled our emergency repair within the same day. Tech arrived on time, explained everything clearly, and fixed the issue on the first try. Cleaned up after themselves — no mess, no hassle. Prices were transparent and fair. Will definitely recommend and use again. Thank you for the reliable service!”
- 5 stars, 21 May 2025: Had a great experience with Koomax for my aircon servicing! The technicians arrived on time, were professional, and explained everything clearly before starting the work. They did a thorough wash and cleaned up after themselves, leaving no mess behind. My aircon is now blowing much colder air and runs more quietly. Prices were reasonable and no hidden charges. Highly recommended for anyone looking for reliable aircon servicing in Singapore! ⭐⭐⭐⭐⭐
- 5 stars, 25 Apr 2025: After servicing, the aircon is very cold, excellent service by Koomax Engineering
- 5 stars, 14 Apr 2025: Just had all 3 of my airconds serviced by Koomax. Booking was a breeze, and they even sent a friendly reminder before the appointment. The team arrived earlier than scheduled and carried out the servicing professionally and efficiently—everything done in just about 50 minutes. Definitely using them again next time.
- 5 stars, 1 Apr 2025: This is definitely not an April Fool's joke. I'm amazed by Koomax's cleaning service. The air conditioner in this room hadn't been properly ventilated, causing it to leak. Two professional technicians worked together for 30 minutes and cleaned the room thoroughly, leaving the floor spotless.

Source: Google listing, ACRA and provider website, checked 20 Sep 2026.

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