Summer’s here—and so are the panicked calls from customers whose air conditioners are suddenly blowing warm air or making strange noises. As HVAC professionals, we’ve all been there: trying to help someone cool their home while their system gives up in the middle of a heatwave.

At Airtek, we work closely with HVAC dealers across Canada, supplying everything from air conditioners and heat pumps to furnaces, boilers, and more. We know what summer service season looks like, and we want to help you stay ahead by spotting the signs of AC trouble before your client ends up without cooling on a 30°C day.

Let’s break down a few of the most common signs an AC unit is on its last legs—and what you can do about it.

1. The Air Isn’t as Cold as It Should Be

This is often the first thing customers complain about: "My AC is running, but the house still feels warm." Chances are, something’s not working right. Maybe it’s a clogged filter, low refrigerant, or a dirty coil. It could also be a failing compressor. Whatever the reason, a drop in cooling performance is one of the clearest signs that something’s wrong—and a service call is due.

2. Strange Sounds Coming From the Unit

Every AC makes noise, but if your client hears grinding, banging, or squealing, it’s not just “normal operation.” These sounds usually mean worn-out components, loose parts, or failing motors. If you catch these early, you might save your customer from a full system failure—or a big repair bill.

3. Leaks or Moisture Around the AC

Water or refrigerant leaking from the unit isn’t just messy—it could be dangerous. Leaky units might have a clogged drain line, a refrigerant issue, or rusted parts. Let your client know this isn’t something to ignore. Quick action can protect both their home and their cooling system.

4. The System Keeps Turning On and Off

If the AC is constantly starting and stopping, it’s short-cycling—and that’s a problem. It can be caused by something as simple as a dirty filter, or as serious as a malfunctioning thermostat or compressor. Either way, this constant cycling puts unnecessary strain on the system and shortens its lifespan.

5. Their Energy Bill Is Climbing

When a customer mentions a spike in their electricity bill, but their usage hasn’t changed, that’s a red flag. An older or struggling AC has to work harder to cool the same space. That extra effort shows up in their monthly costs—and it may be time to talk efficiency upgrades.

Pro tip: Offer them a high-efficiency replacement. At Airtek, we carry top-performing energy-efficient AC units ready to ship across Canada.

6. The Unit is Over 10 Years Old

AC units don’t last forever. If your client’s system is pushing past the 10-year mark, repairs may start piling up. Let them know that replacing an aging unit with a new, efficient system could actually save them money in the long run—and improve comfort too.

Looking for a reliable replacement unit? Airtek has you covered, with a wide range of air conditioners built for Canadian summers.

Why This Info Matters (and How You Can Use It)

Spotting these warning signs early helps your customers avoid emergency calls—and it helps you stay proactive. Offering seasonal inspections, preventative maintenance, and honest upgrade advice positions you as a go-to expert.

As your go-to B2B HVAC supplier, Airtek is here to support your business with quality products, dealer pricing, and fast delivery—no matter where you are in Canada.

Ready to Upgrade a Failing AC?

Don’t let your clients sweat it out this summer. Explore our full selection of air conditioners and cooling systems online. We’ve got what you need—backed by HVAC expertise and reliable service.

 Browse Air Conditioners at AirtekShop.com