Can a business pay to get a higher score or better ranking?

No. The composite score is calculated purely from the five signals described above. Paid placements are labelled clearly when they appear and have no effect on a business's score or its position in the ranked directory.

Why does a contractor with a perfect 5-star rating sometimes rank lower than one with a 4.5?

A perfect rating based on a very small number of reviews carries less statistical weight than a 4.5 built on hundreds of reviews. Review volume and sentiment also contribute to the final score, so a business with more evidence behind it will often rank higher even if its raw star average is slightly lower.

What does the 'low confidence' label mean?

It means the business has too few recent reviews for the score to be reliable. The score is shown so you have some starting point, but you should do extra checks before hiring, such as asking for references or calling to verify the business is still active.

How often is the data updated?

We refresh ratings, review counts, and profile details on a regular cycle. If you spot something that looks out of date on a listing, the Google link on every page will show you the current state of the business's reviews directly from the source.

How we rank air conditioning contractors in Petaling Jaya

PJ Aircond Companies lists 358 air conditioning contractor businesses across Petaling Jaya, from small sole-operator outfits in SS2 to multi-branch service centres covering Damansara, Subang Jaya, and beyond. Every business in the directory gets a composite score from 0 to 100. This page explains exactly how that score is built, what it can tell you, and where it falls short.

The five signals and why each one matters

Our score draws on five measured signals. Each is weighted according to how much it actually predicts a good hiring experience for an aircon job.

Star rating (30%). We pull the aggregate Google star rating for each business. A high rating across many customers is the single strongest signal that a contractor delivers on the basics: turning up on time, installing or servicing the unit correctly, and charging what was quoted. It carries the largest weight for that reason.
Review sentiment (25%). Star averages can mask a lot. A business sitting at 4.2 stars might have a cluster of recent complaints about no-shows or hidden fees. We read recent review themes and synthesise them into a sentiment signal: consistent praise for workmanship and communication pushes the score up; repeated complaints about response time or parts quality pull it down. We do not republish review text. If you want to read the source reviews, we link directly to the business's Google listing.
Review volume (25%). Ten five-star reviews and five hundred five-star reviews are not the same thing. Volume is log-scaled, so the difference between 5 reviews and 50 reviews moves the score more than the difference between 500 and 1,000. This keeps a handful of enthusiastic friends from inflating a score, without unfairly burying a genuinely good small operator who simply has fewer customers.
Recency (15%). An aircon contractor's quality can change quickly. Staff turn over, ownership changes, and a business that was excellent three years ago may not be today. Recency measures how recently customers have been leaving reviews. A healthy stream of reviews in the past six to twelve months scores higher than a business whose last review was two years ago.
Profile completeness (5%). This checks whether the business has a phone number, website, operating hours, and a street address listed. It carries a small weight because a missing website does not make a contractor bad at aircon work. But an incomplete profile does make it harder for you to contact or verify a business, and contractors who keep their details current tend to be more attentive generally.

Low-confidence scores

When a business has very few recent reviews, the signals above are statistically thin. We cannot reliably separate a genuinely excellent new contractor from one that has simply not been reviewed enough to reveal problems. Any business in this situation is clearly labelled as low confidence in its listing. Treat those scores as preliminary, not definitive.

Rankings are earned, not bought

Position in the directory is determined entirely by the composite score described above. We do not accept payment to move a business up the rankings or to improve its score. Paid placements, when they exist, are always clearly labelled as such in the listing, and they do not affect the score or the organic ranking order in any way.

Where the data comes from

Ratings, review counts, sentiment themes, and recency are sourced from Google. Business profile details (phone, address, hours, website) are drawn from publicly listed information. We update the data regularly, but there may be a lag between a change at the business and what appears here. For the most current reviews, follow the Google link on any listing.

You can browse the full directory from the home page or go straight to our curated picks on the best aircon installation contractors in Petaling Jaya list.

FAQ

Can a business pay to get a higher score or better ranking?: No. The composite score is calculated purely from the five signals described above. Paid placements are labelled clearly when they appear and have no effect on a business's score or its position in the ranked directory.
Why does a contractor with a perfect 5-star rating sometimes rank lower than one with a 4.5?: A perfect rating based on a very small number of reviews carries less statistical weight than a 4.5 built on hundreds of reviews. Review volume and sentiment also contribute to the final score, so a business with more evidence behind it will often rank higher even if its raw star average is slightly lower.
What does the 'low confidence' label mean?: It means the business has too few recent reviews for the score to be reliable. The score is shown so you have some starting point, but you should do extra checks before hiring, such as asking for references or calling to verify the business is still active.
How often is the data updated?: We refresh ratings, review counts, and profile details on a regular cycle. If you spot something that looks out of date on a listing, the Google link on every page will show you the current state of the business's reviews directly from the source.