Air Conditioning Inspection — What Your Inspector Checks

I was crawling through the basement of a 1970s split-level on Fairview Street yesterday when I heard it. That grinding, metal-on-metal sound coming from the furnace room that every homeowner dreads. The air conditioning unit was running in March, which told me everything I needed to know about this system before I even opened my toolbox. My buyers were upstairs talking excitedly about kitchen renovations while I was discovering their $12,300 reality check.

After fifteen years of inspecting Burlington homes, I've learned that air conditioning systems are where dreams go to die. You walk into these beautiful 1960s and 1980s homes in Aldershot or Tyandaga, and the sellers have staged everything perfectly. Fresh paint, new fixtures, maybe even granite counters. But down in that basement sits a 20-year-old AC unit that's been limping along on borrowed time.

What I find most concerning isn't just the age of these systems. It's how buyers consistently ignore the warning signs. They'll spend twenty minutes debating cabinet hardware but give the HVAC system a casual glance. Sound familiar?

The reality is harsh in Burlington's housing market. These homes averaging $920,000 often come with air conditioning systems that were installed when the houses were built or maybe upgraded once in the 1990s. I've inspected split-levels on Plains Road where the outdoor condenser unit looks like it survived a war. Rust eating through the coils, refrigerant lines that haven't been serviced in a decade, and ductwork that's been patched so many times it resembles a quilt.

Here's what buyers always underestimate. A complete central air system replacement in Burlington runs between $4,800 and $8,750 for a standard home. But that's just the beginning. If the ductwork needs updating, which it usually does in these older homes, you're looking at another $3,200 to $6,400. Add electrical upgrades because the old panel can't handle the new system's requirements, and suddenly you're staring at a $14,750 surprise.

I remember this one inspection last spring on Brant Street. Gorgeous 1960s bungalow, everything looked perfect. The sellers had even cleaned the basement, which should have been my first red flag. Nobody cleans a basement unless they're hiding something. Guess what we found? The AC unit was literally held together with duct tape and prayer. The evaporator coil had been leaking for months, creating this musty smell that the sellers had masked with air fresheners.

That's the thing about Burlington's older housing stock. These homes were built during an era when central air wasn't standard. Many had window units or no cooling at all initially. When central air was retrofitted later, it wasn't always done properly. I've seen systems where the ductwork was clearly an afterthought, snaking through spaces that were never designed for airflow. The result is uneven cooling, sky-high energy bills, and systems that work twice as hard to achieve half the comfort.

The outdoor units tell their own story. After surviving forty Canadian winters, these condensers develop problems that go way beyond normal wear. I've documented refrigerant leaks that have been slowly poisoning lawns for years. Compressors that sound like cement mixers. Fan motors that seize up every time the humidity climbs above sixty percent.

But here's what really gets me frustrated. Sellers know these systems are failing. They've been nursing them along with temporary fixes, calling repair services for band-aid solutions instead of facing the replacement cost. Then they list the house and hope the inspector won't notice or the buyers won't care.

In fifteen years, I've never seen a 25-year-old air conditioning system that didn't need major work within two years of purchase. It's not if, it's when. And when that system fails during Burlington's first heat wave in July, good luck getting a contractor out quickly. You'll be looking at emergency service rates and a three-week wait for parts.

The smart buyers I work with ask specific questions during my inspections. When was the system last serviced? Are there maintenance records? What's the actual age of both the indoor and outdoor components? Because sometimes sellers replace just the outdoor unit and leave the old evaporator coil inside. That's like putting new tires on a car with a blown engine.

I always check the electrical connections too. These older systems draw significant power, and I've found countless examples of inadequate wiring or overloaded circuits. One house in Downtown Burlington had an AC unit running off an extension cord through a basement window. The homeowner had been doing this for three summers because updating the electrical was too expensive.

What surprises people most is learning that size matters with air conditioning. Bigger isn't always better. I've inspected homes where previous owners installed oversized units thinking more cooling power meant better comfort. Wrong. An oversized system cycles on and off too frequently, never running long enough to properly dehumidify the air. You end up with a house that's cold but clammy.

The maintenance records tell the whole story if you know how to read them. No records usually means no maintenance. Service calls every spring might indicate ongoing problems. Multiple refrigerant top-ups suggest chronic leaks. I document everything because come April 2026 when you're sweating through your first Burlington heat wave, you'll understand why I was so thorough.

Burlington's housing market is competitive enough without getting blindsided by HVAC failures. I've watched too many families stretch their budgets for these beautiful older homes only to discover they need another $15,000 for basic comfort systems. Get the inspection, ask the hard questions, and budget for reality.