Every spring, the same question lands in our inbox: how often does an air conditioner actually need to be serviced? It’s a fair question. Your AC sits quietly for seven or eight months of the year, then gets asked to run almost continuously through an Ottawa summer. Staying on top of AC maintenance in Ottawa is the difference between a system that hums along all season and one that quits during the first heat warning.

The short answer is once a year, before cooling season starts. But the longer answer — what that service should include, what you can handle yourself, and when your system needs more attention than an annual visit — is worth understanding.

The Short Answer: Once a Year, Every Year

A central air conditioner should be professionally serviced once per year, ideally in spring before you rely on it. That single annual visit catches the wear that accumulated last summer and the problems that developed while the system sat idle over winter.

Skipping a year rarely causes an immediate breakdown. The damage is cumulative: a slightly dirty coil makes the compressor work harder, which raises your energy use, which shortens the compressor’s life. By the time you notice a problem, you’re often looking at a repair rather than a tune-up.

If your system is a heat pump that both heats and cools, it works year-round and should be serviced twice a year — once before cooling season and once before heating season.

Why Spring Is the Right Time in Ottawa

Timing matters more here than in milder climates. Our cooling season is short and intense: the system goes from completely dormant to running hard, sometimes within the same week.

Servicing in spring means problems get found while they’re still small and while technicians have availability. Book during the first genuine heat wave and you’re competing with every other homeowner in the city who had the same idea. Emergency AC repair in Ottawa during a heat warning costs more and takes longer to schedule than a routine spring visit.

There’s also a practical reason: a technician can’t properly test cooling performance when it’s below roughly 15°C outside. Late April through May is the sweet spot.

What a Professional AC Tune-Up Actually Includes

“Service” means different things to different companies, so it’s worth knowing what a thorough visit covers:

Refrigerant charge check — verifying the system holds the correct amount and looking for leaks
Coil cleaning — both the outdoor condenser coil and the indoor evaporator coil
Electrical inspection — tightening connections, testing capacitors and contactors
Condensate drain clearing — preventing the clogs that cause water damage
Blower and airflow assessment — confirming air is actually moving through the ducts
Thermostat calibration — making sure the system responds to what you set
Overall performance test — measuring the temperature difference across the coil

A visit that consists only of hosing off the outdoor unit is not a tune-up. Ask what’s included before you book.

What You Should Do Yourself Between Visits

Professional service once a year works only if you handle the basics in between. Three things matter most:

Change the air filter. This is the single highest-impact task a homeowner can do. Most filters need replacing every one to three months during heavy use. A clogged filter restricts airflow, which can freeze the coil and eventually damage the compressor.

Keep the outdoor unit clear. Leave roughly two feet of open space around the condenser. Trim back shrubs, pull weeds, and clear grass clippings off the fins after mowing.

Check the vents. Make sure supply and return registers aren’t blocked by furniture, rugs, or curtains. Restricted airflow is behind a surprising share of the AC not cooling calls we get every July.

Signs Your AC Needs Attention Before Its Annual Visit

An annual schedule is the baseline, not a ceiling. Call sooner if you notice:

The system runs constantly but the house never reaches the set temperature
Airflow from the vents is noticeably weaker than last season
New noises — grinding, screeching, or repeated clicking
Water pooling near the indoor unit
Ice forming on the refrigerant lines or coil
A jump in your hydro bill that your usage doesn’t explain
Musty odours when the system starts up

Any of these is worth a call. Several of them together usually means something has already failed.

How Age Changes the Maintenance Equation

A three-year-old system and a fifteen-year-old system need different attention. Newer equipment under warranty generally needs its annual visit and little else — and most manufacturers require documented annual maintenance to keep that warranty valid.

Older systems benefit from closer monitoring. Components that were fine last year may be marginal now, and catching a failing capacitor in May is far cheaper than replacing a compressor in July.

Once a system passes the fifteen-year mark, the conversation shifts. At some point the annual repair bill and the efficiency penalty outweigh the cost of new equipment, and it’s worth pricing out AC installation in Ottawa rather than continuing to patch.

The Case for a Maintenance Plan

Many Ottawa homeowners find it easier to put maintenance on a plan than to remember to book it. A typical plan bundles the annual visit, moves you up the queue during busy periods, and often includes a discount on repairs.

The real value is that the visit actually happens. The most common reason a system goes five years without service isn’t cost — it’s that nobody remembered to call in May. Comprehensive HVAC services in Ottawa can cover your cooling and heating equipment on a single schedule.

Frequently Asked Questions

Can I skip a year if my AC seems to be working fine?

You can, but it’s a gamble. Most of what a tune-up addresses — a dirty coil, a slowly leaking refrigerant charge, a weakening capacitor — produces no symptoms you’d notice until the system struggles under load. That usually happens on the hottest day of the year. It also may void your manufacturer warranty, which typically requires documented annual service.

How long does an AC tune-up take?

A thorough visit on a typical Ottawa home usually takes about an hour to ninety minutes. If the technician finds a problem that needs correcting, it may run longer. Be cautious of a service call that wraps up in fifteen minutes — that isn’t enough time to check refrigerant, clean coils, and test electrical components properly.

Do I need maintenance on a brand-new air conditioner?

Yes. New systems still accumulate dirt on the coils and still need their refrigerant charge and electrical connections verified. More importantly, most manufacturers require proof of annual professional maintenance for warranty coverage to stay in force. Skipping service on a new unit can cost you the warranty on an expensive component.

What’s the difference between AC maintenance and AC repair?

Maintenance is scheduled, preventive work on a system that’s functioning — cleaning, testing, adjusting. Repair is corrective work on something that has already failed or is failing. Regular maintenance doesn’t eliminate repairs, but it catches small problems before they become the kind that leave you without cooling in August.

Should I service my heat pump on the same schedule?

No — a heat pump needs servicing twice a year because it runs in both seasons. Schedule one visit in spring before cooling season and another in fall before heating season. The equipment does roughly double the annual runtime of a cooling-only air conditioner, and the maintenance interval should reflect that.

Final Takeaway

Once a year, in spring, before you need it. That’s the rule for a central air conditioner in Ottawa — twice a year if you have a heat pump. Between visits, change the filter, keep the outdoor unit clear, and don’t ignore new noises or weak airflow.

Maintenance isn’t glamorous, and it’s easy to put off. But the homeowners who call us in a panic during a heat warning are almost never the ones who booked a tune-up in May.

Book Your AC Maintenance in Ottawa

Ultra Air Heating & Cooling
53 Kinetic Way, Ottawa, ON K2J 0E1
Phone: (613) 762-3035
Book Online: ultraairhvac.ca/contact-us

Ready to get your cooling system checked before the heat arrives? Contact Ultra Air today to schedule a full AC tune-up and head into summer knowing your system is ready for it.