| Check | How often | Who does it |
|---|---|---|
| Filter replacement or cleaning | Per manufacturer guidance; often every few months | Homeowner |
| Clearing the outdoor unit (leaves, debris) | Spring and fall | Homeowner |
| Full cooling-cycle test | Spring, before the heat | Homeowner, then technician if anything seems off |
| Coil cleaning, condensate and electrical checks | Yearly | Qualified technician |
Why spring, not July
The most expensive moment to discover a dead air conditioner is the first heat wave: companies are swamped, emergency slots stretch out, and you sweat while waiting. Spring flips the equation: appointment books are open and problems found early get solved calmly.
Testing early has a second benefit: a system struggling to start sends soft signals: laboured startup, lukewarm air at the beginning of a cycle, a new noise. Caught in April, those clues allow a planned visit instead of a declared breakdown in July.
Spring maintenance is nothing dramatic: it is discipline. A few checks at home, one professional visit a year, and most mid-season surprises simply evaporate.
Your part: filters and surroundings
First habit, highest value: check the filters. A clogged filter forces the system to work harder to deliver less, wears the blower and degrades indoor air quality. Follow the manufacturer’s instructions for frequency and airflow direction: it’s printed on the filter frame.
Second habit: the outdoor unit. Clear leaves, branches and debris left over from winter, keep open space around it for airflow, and level it if the ground shifted during thaw. Never open the cabinet or hose down the coils: that belongs to the technician.
Third habit: the run test. In cooling mode, set a firm temperature drop and observe: does the supply air stay cool, does the cycle end cleanly, is water pooling near the indoor unit? Three minutes of observation buy weeks of foresight.
The technician’s part: what you can’t see
Behind the panels, annual service covers what eyes can’t see: coil cleanliness where heat exchange happens, condensate drain and pump condition, tightened electrical connections, refrigerant pressure measurements and charge verification. Those items decide real-world performance and equipment lifespan.
An important note on refrigerant handling: it is regulated activity, reserved for trained and authorised individuals. For service touching the refrigerant circuit or electrical components, retain a qualified company (a verified RBQ-licenced contractor), whose technicians hold the required credentials.
Ask for the service report: measurements taken, anomalies noted, recommendations going forward. This small document builds your system’s history, and it is exactly what supports an informed decision when the “repair or replace” question eventually arrives.
Signals that shorten the wait
Some findings during your spring test justify moving the visit up: air staying warm despite a low setting, frost on the pipe linking to the outdoor unit, water under the indoor unit, or an unusual smell at startup.
Other situations belong to the calendar rather than worry: a light startup noise that fades, slightly long cycles on the first warm days. Write them down and share them at the annual service: context helps the technician.
Either way, keep the simple rule: what you can do without tools, do; what requires opening a cabinet, measuring pressure or touching an electrical connection, hand over. The line is crisp, and it protects your warranty as much as your safety.
Verified and sourced
Verified on September 27, 2026
Official sources
What these numbers do not cover
The efficiencies quoted come from ENERGY STAR ratings; an installed unit’s real condition is not read off its nameplate.