I’ve been on air conditioner service calls in Calgary for about 15 years now, and a funny thing happens every summer. You wait all winter, you finally flip cooling on, and then something small picks that exact day to quit. Sometimes it’s a worn capacitor. Sometimes it’s a contactor that’s been chattering for months. Sometimes it’s just a clogged drain and a float switch doing its job. You’re hot, you’re annoyed, and you want numbers before you book a visit. Fair.

This page is about the stuff I keep seeing over and over in the field, with ballpark pricing so you can plan. Not a perfect quote, because I haven’t seen your unit yet, and I’ve learned the hard way that photos never tell the whole story. Well, usually anyway. But you’ll get a realistic range for parts and labour, plus a bit of context on why one “simple” fix can turn into two trips if access is brutal or the system is older than you think it is.

I’ll also be straight with you about homeowner habits that push these failures along. Filters left in too long, cottonwood plugging up outdoor coils, vents blocked by furniture like the house is playing a prank on itself. I’m not judging. I’ve just pulled enough matted fluff out of condensers to have mild opinions. If you’re looking for local help or just want to see what we do, here’s our air heating and air conditioning page.

By the time you’re done reading, you should be able to hear a symptom, look at the unit, and think, “Okay, that’s probably a capacitor or a fan motor,” and know if you’re in the “hundreds” zone or the “this might sting” zone. That alone cuts down the stress, which is half the battle when the house feels like a greenhouse.

AC Fixes You’ll See Often in Calgary, Plus Real-World Price Ranges

I’m Chris, been on service calls around Calgary for 15 years, and I can tell you this: air conditioners fail in pretty predictable ways. You hear a new noise, air feels weak, house gets sticky, and you start searching house air conditioning near me on your phone while standing over a floor vent like it’s going to explain itself. Prices swing with brand, access, and whether someone “had a look” before we got there, but I’ll give ranges that match what I see day to day.

Capacitors and contactors are up there for frequent callouts. A bad capacitor gives you that outdoor unit hum with no fan spin, or it starts and stops like it’s thinking about it. A worn contactor can chatter, weld shut, or just fail to pull in, so nothing runs outside even though your thermostat is calling. Budget roughly CAD $250 to $600 for one of these parts installed, assuming nothing else is cooked and we can get at the panel without fighting shrubs, deck boards, or a “creative” dog enclosure.

Next one: condensate drain clogs on the indoor coil, especially once the weather turns and humidity climbs. Water on the floor near the furnace, float switch tripped, system off, and you think the AC is dead when it’s really the safety doing its job. If it’s a simple clear and flush, you’re often in that CAD $180 to $350 zone; if the drain is routed weird, glued in tight, or the pan is cracked and we’re chasing a slow leak, you can see CAD $400 to $900.

Refrigerant trouble: leak checks, recharges, and the stuff nobody wants to pay for

Low refrigerant is not “just needs a top-up.” If it’s low, it leaked out, and if you refill without finding the leak, you’re buying the same gas twice. I’ve found leaks on service valves, rubbed-through linesets, and indoor coils that look fine until you soap-test them and get that little bubble trail. A basic diagnostic and recharge can land around CAD $350 to $900 depending on refrigerant type and amount, but proper leak finding plus repair can push CAD $700 to $2,500. If the indoor coil is the culprit, add more. That part is not cheap and it’s not fun to access in some basements.

Fan motors get ignored until they don’t start. Outdoor fan motor failure can make the unit overheat and trip, and indoor blower issues leave you with weak airflow and ice on the coil. Motors plus labour often run CAD $450 to $1,200, and it varies because some are simple PSC motors and some are ECM and priced like they know you’re desperate on a hot week.

Controls and electrical: small parts, big headaches

Thermostats, low-voltage shorts, and safeties can waste a lot of time if wires are chewed, pinched, or spliced with the wrong connectors. I’ve opened furnaces and found thermostat wire twisted together and taped like it’s a Christmas light repair. A clean thermostat swap might be CAD $250 to $650 supplied and installed; chasing a short or replacing a transformer and tidying wiring can be CAD $300 to $900, sometimes more if access is rough or the issue is intermittent and only shows up after the unit runs for 20 minutes.

Last one I’ll mention is compressor problems. It’s not the usual failure, but it’s the one that changes your day. Hard starts, locked rotor, tripping breaker, loud grinding, or it runs but pressures don’t make sense. A hard-start kit can be a decent hail-Mary at CAD $300 to $600 if the compressor is just struggling, but a compressor change is often CAD $2,500 to $5,500, and at that point a lot of people lean toward replacing the whole outdoor unit or matched system. I don’t blame you. I just wish more homeowners would rinse the condenser coil and change filters on time, because neglect doesn’t always cause the failure, but it sure speeds it up.

Diagnosing Weak Airflow: Blower Motor, Capacitor, or Clogged Filter–Typical Repair Costs

Weak airflow feels like your AC is running but your house is not getting anywhere, and you start thinking the outdoor unit is the problem. A lot of the time it is not. I walk into Calgary homes where the return filter is so packed with dog hair and drywall dust that the blower is basically trying to breathe through a pillow. Check that first. If the filter is cheap and disposable, swap it. If it is a washable one, clean it properly and let it dry, then put it back. If your system is also making ugly sounds while it struggles, this page lines up with what I hear on calls: Why is my Air Conditioning making a loud/strange noise?

If the filter is clean and the airflow is still weak, I start looking at the indoor blower section. A tired capacitor is a classic. The fan tries to start, hums, maybe spins slow, then quits, and you get low air at the registers or none at all. Capacitor replacement (part and labour) often lands around CAD $200 to $450 depending on access and exact rating. If the blower motor itself is failing, the bill jumps. ECM motors especially. I have seen those run CAD $900 to $2,000+ installed, while older PSC motors can be lower, say CAD $600 to $1,200. If you are booking service and want a local crew that does this stuff daily, here is our page: calgary air conditioning

One more thing people miss: a clogged evaporator coil. You cannot see it without opening panels, and it chokes airflow like a blocked furnace filter but with more mess. Coil cleaning is often CAD $350 to $900 depending on how bad it is and whether the indoor cabinet has room to work in. If the coil is icing because airflow has been low for a while, you can end up paying for a diagnostic visit plus the cleaning, plus possibly refrigerant work if a leak is found. Weak airflow problems show up on a central air conditioning unit the same way every time: rooms feel stale, vents barely push, and the system runs longer than it should, which is not doing your power bill any favours.

Q&A:

My AC is running but not cooling much—what’s the most common repair and what does it usually cost?

If the indoor fan runs but the air stays warm, the usual suspects are a dirty air filter/coil, a failing capacitor, or low refrigerant due to a leak. The cheapest fix is cleaning and a new filter (often $100–$300 for a basic service visit, depending on the unit and access). A bad capacitor is also common; parts are inexpensive, but labor and diagnostics bring it to roughly $150–$350. If the system is low on refrigerant, a technician should first locate and repair the leak—just “topping off” doesn’t last. Leak detection and repair can range widely (about $200–$1,500+ depending on where the leak is), and refrigerant recharge often adds another $200–$600+ based on type and amount. If your unit uses R-22, refills can be significantly higher because it’s harder to source.

The outdoor unit clicks but the AC won’t start. Is that a contactor issue, and what price range should I expect?

Clicking from the outdoor unit with no start is commonly tied to the contactor (the electrical switch that sends power to the condenser) or a weak capacitor. A contactor replacement is a routine repair: typically around $200–$500 installed, depending on brand, local labor rates, and whether the panel and wiring are in good shape. If it’s a capacitor instead, the bill is often a bit lower ($150–$350). A service call usually includes diagnostics, so the final number depends on what fails.

My AC keeps freezing up (ice on the lines/coil). What repair is usually needed, and what does it cost?

Freezing is usually airflow or refrigerant related. First checks are simple: clogged filter, blocked vents, dirty evaporator coil, or a blower problem. If it’s airflow, cleaning the coil and fixing the airflow restriction often lands in the $150–$600 range depending on how dirty the coil is and how hard it is to reach. If a blower motor or control is failing, repairs can jump to about $300–$900+, and a full blower motor replacement can run $500–$1,500+. If refrigerant is low because of a leak, costs look like: leak search/repair ($200–$1,500+) plus recharge ($200–$600+). Running an iced-up unit can damage the compressor, so it’s best to shut it off and let it thaw before the visit.

I’m hearing a loud buzzing/grinding sound and the breaker sometimes trips. Could that be the compressor, and how expensive is that repair?

Buzzing, grinding, and breaker trips can point to several things: a failing capacitor, a burnt contactor, loose wiring, a seized condenser fan motor, or compressor trouble. Many “scary noise” cases end up being capacitor/contactor or fan motor—not the compressor. Fan motor replacement often runs about $300–$900+ (motor type and accessibility matter). If it’s the compressor, that’s one of the pricier jobs: compressor replacement commonly falls around $1,500–$3,500+ and may be higher on certain systems. On older units, some homeowners choose to replace the entire outdoor unit or full system instead, especially if parts are hard to get or the refrigerant type makes repairs expensive.