If your air conditioner seems to run all day but your Aylmer home still feels sticky and uncomfortable, you are not imagining it. Summers in Ontario are not just hot, they are humid, and moisture plays a major role in how comfortable a house feels even when the temperature looks fine on the thermostat.
Three Signs It's the Equipment, Not the Ducts
All vents weak, everywhere. One quiet vent points to a duct issue; every vent showing the same weak flow points to the blower, filter, or coil. Ice on the refrigerant lines. Frost means low refrigerant or a starved coil, and it needs a professional. Audible strain. A blower that has gotten noticeably louder over the season is telling you something.
Age, Size, and the Ceiling They Set
An aging unit. As a system gets older, its compressor and coils slowly lose efficiency, so it delivers less cooling on the hottest, most humid days, exactly when you need it most.
An undersized system. If the unit was never matched to the home's cooling load, it falls behind on peak afternoons and never catches up. Sizing can overshoot in the other direction, too: an oversized unit short-cycles, cooling in quick bursts that leave the air cold but clammy because the system never runs long enough to dry it.
Refrigerant, the Building, and the Fix
Low refrigerant. A slow leak stretches every cycle and can eventually damage the compressor. Poor insulation and air leaks. Warm, humid air leaking in through the attic, windows, and doors adds load the equipment was never meant to carry; sealing gaps and adding insulation can genuinely change how the system performs.
When Aylmer Heating & Cooling services a system, the visit covers the full chain: pressure-testing the charge, cleaning the coils, measuring airflow, and confirming the unit is sized for the home as it stands today.
Long Cycles Are Normal; Nonstop Running Is Not
Ontario summers are humid, and humidity changes what your air conditioner has to do. Along with cooling, the system wrings moisture out of the air, and damp air takes much longer to treat than dry air. During a muggy July stretch, even a healthy system runs longer cycles than usual.
The line to watch is whether the system ever shuts off. A properly working unit labours through the afternoon and recovers in the evening. One that runs around the clock is telling you it cannot handle the load, and every cause behind that has a name.
Dirt Is the Most Common Culprit of All
A clogged filter. When the filter is full, airflow drops and the system cannot move enough air to cool or dehumidify properly. Dirty coils. Dust building up on the indoor and outdoor coils blocks heat exchange, so heat that should be carried outside simply stays put.
A blocked condenser. Grass clippings, leaves, or a fence placed too close trap heat around the outdoor unit, forcing it to work even harder on days that are already tough.
