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As the weather warms up, your building begins to shift out of winter mode. Boilers have been running steady for months and rooftop units have taken on ice, salt, and wind. By early March, a few small issues will often start to surface, even if your commercial building seems fine at first glance.
Take this scenario for example: A mild March day exposes a stuck economizer and a condensate pump that no longer moves water. The Building Automation System (BAS) is still on its winter schedule, so cooling never starts on time. By April, half the cooling system is offline and replacement parts are weeks away. Sound familiar?
Across Ontario, freeze-thaw cycles take a toll on aging rooftop units, forgotten overrides cause equipment to break down, and property managers end up with more complaints and service calls. A quick round of pre-spring maintenance helps you catch issues early and give your building a smoother shift into cooling mode.
This checklist will help you prepare your HVAC system for spring and keep both your mechanical equipment and controls ready for the season ahead.
Cold weather affects belts, bearings, and pulleys. Ice often creates small cracks you won’t see until the system moves into cooling mode, and pulleys that seem slightly misaligned now will cause strain in April. Replace any belt with visible wear and check tension throughout the unit. Look for loose wiring or panels that shifted during winter storms.
Outdoor coils collect salt, debris, and dust through winter. This restricts airflow and raises compressor temperatures. The best time to clean rooftop HVAC coils is late winter or early spring, when the equipment is still off and easy to reach. Schedule condenser coil cleaning before the first warm spell to get your system in tip-top shape for spring.
Conduct a controlled start-up test to help catch pressure or voltage issues early and to protect compressors and keep them running smoothly. This small step protects compressors and keeps cooling stable.
Your HVAC technician should also make sure fan motors start cleanly and that electrical connections are tight. And if you need any help getting your rooftop unit back into working order this season, you know who to call!
Schedules that worked in January are not right for spring. Your heating setpoints— the temperatures your system targets to warm the building— often stay too high after winter.
Look in your Building Automation System (BAS) to see if anything is still stuck in a winter setting. Update the heating and cooling schedules so they match daytime and nighttime needs. Make sure sensors give the right readings and your logs record new data.
A quick trend review often shows dampers that are stuck or equipment in the wrong mode. Fixing these items early reduces tenant calls and future headaches for you.
Spring offers great outdoor air for cooling. However, this only works when dampers open and close on command. Inspect linkages, actuators, and seals. Repair any binding or misalignment right away. Confirm that sensors calling for fresh air are reading accurate temperatures.
Economizer issues often stay hidden until the first warm day. Fixing them early helps manage energy use and keeps return air from overheating.
As humidity increases, condensate lines start moving more water. Make sure drains are clear, slope properly, and have no buildup. Flush any line that shows blockage so water does not back up into ceiling tiles or mechanical rooms. Inspect insulation on piping and drain pans to prevent leaks once cooling runs for longer hours.
Need help getting your HVAC ready for spring?
Our inspection covers both mechanical equipment and your building’s control system. Our technicians work across Burlington, Hamilton, Niagara, and the Golden Horseshoe. We fine-tune performance, document findings clearly, and fix issues during the visit so your building is ready for the cooling season. Reach out to schedule your inspection and keep your building running steady through the warmer months.
