AC Check Up – Tips for HomeOwners: How to Keep Your Air Conditioner Running All Summer

AC Check Up – Tips for HomeOwners: How to Keep Your Air Conditioner Running All Summer Summer in Sherwood Park arrives fast — and when temperatures climb, the last thing you want is an air conditioner that can’t keep up. The good news is that most AC breakdowns don’t happen overnight. They build up over weeks and months of skipped maintenance, dirty filters, and small issues that quietly grow into expensive problems. A proactive maintenance routine is the single best thing you can do to extend the life of your system, maintain consistent comfort, and avoid emergency service calls on the hottest day of the year. This checklist walks you through exactly what needs to happen — and when — to keep your air conditioner running reliably all season long. Why Checking Your AC Matters Alberta’s climate is harder on HVAC equipment than many homeowners realize. The swing between cold winters and hot summers means your air conditioner sits dormant for a large portion of the year before being asked to perform at full capacity. Dust and fluff settle in coils, debris clogs outdoor units, and refrigerant lines sit idle for months. When summer arrives, and you flip that switch, a neglected system has to work harder to reach your set temperature. That extra strain translates directly into higher energy use, faster component wear, and a shorter overall lifespan. Regular maintenance resets that cycle — keeping the system clean, efficient, and ready to perform when you need it most. DIY AC Check-Up Tips for Homeowners Replace or Clean the Air Filter (Every 1–3 Months) The air filter is the most frequently neglected component in any HVAC system — and one of the most important. A clogged filter restricts airflow, forcing your blower motor to work harder while simultaneously reducing the quality of air circulating through your home. During peak cooling season, check your filter every month. If it looks grey and dense with dust, replace it. Homes with pets, allergies, or multiple occupants will need more frequent changes than homes with one or two adults and no animals. Using the right filter for your system matters too. Higher MERV-rated filters trap more particles but restrict more airflow. Check your manufacturer’s guidelines before upgrading to a thicker filter — not every system is designed to handle the extra resistance. Clean the Outdoor Condenser Unit Your outdoor condenser unit pulls warm air from inside your home and releases it outside. For this process to work efficiently, the unit needs unobstructed airflow on all sides. Before the cooling season begins, inspect the unit for: Grass clippings, leaves, and cottonwood seeds packed into the fins Bent or crushed fins along the sides of the unit Vegetation growing within 60 cm of the unit Any objects stored nearby that block airflow Use a garden hose to gently rinse the fins from the inside out — never use a pressure washer, as the force can bend the fins and reduce efficiency. Clear at least 60 cm of space around the entire unit, and trim back any shrubs or plants that have grown too close over winter. Check and Clear the Condensate Drain Line When your AC removes humidity from the air, that moisture collects in a drain pan and exits through a condensate drain line. Over time, algae, mould, and debris can clog this line — causing water to back up into the drain pan, overflow, and potentially damage your ceiling, walls, or flooring. Clearing the condensate line is a straightforward maintenance step. Pour a small amount of diluted white vinegar through the access point in the line every few months during the cooling season to prevent algae buildup. If you notice water pooling around your air handler or a musty smell coming from your vents, the drain line is likely the culprit and should be inspected promptly. Test the Thermostat Before the Season Starts Before the first hot day hits, test your thermostat to confirm it’s reading and responding accurately. Set it to cooling mode and lower the temperature below the current room reading — your system should kick on within a few minutes. If you’re using an older mercury thermostat, this is a good time to consider an upgrade to a programmable or smart thermostat. Modern thermostats give you precise control over your indoor temperature, allow you to set schedules that match your family’s routine, and can help reduce energy consumption by not cooling an empty house throughout the day. Check All Vents and Registers Walk through your home and inspect every supply and return vent. Vents should be: Open and unobstructed by furniture, rugs, or curtains Free of dust buildup on the grilles Blowing cool air consistently Closing vents in unused rooms might seem like a smart way to redirect airflow — but it actually increases pressure in your ductwork and forces your system to work harder. Keep vents open throughout the home for balanced airflow. Listen for Unusual Sounds During Operation A well-maintained air conditioner runs quietly. When you start your system for the first time each season, take a moment to listen. Sounds you should not ignore include: Rattling or banging: Often indicates a loose component inside the air handler or outdoor unit Squealing or screeching: Typically signals a failing belt or motor bearing Clicking that doesn’t stop: Could point to an electrical issue or a failing relay Hissing: A potential sign of refrigerant escaping from the refrigerant lines If you hear any of these sounds, shut the system down and call a licensed HVAC technician. Running a system through an audible problem almost always makes the underlying issue worse. Schedule a Professional Maintenance Annually DIY maintenance keeps your system clean and catches obvious issues — but it doesn’t replace what a licensed technician can find during a comprehensive tune-up. A professional AC service includes: Checking refrigerant levels and inspecting for leaks Measuring airflow across the evaporator coil Testing electrical connections and capacitor readings Lubricating moving parts in the blower