The Michigan Winter Prep HVAC Checklist

HVAC unit outside in the winter covered with snow in MI

Now that fall is here and the leaves are changing in Grand Rapids, it’s the perfect time to get your HVAC system ready for the heating season. A little prep now saves you from stress later—and you can knock out most of these steps in just a couple of hours. Follow this checklist to help your system run smoothly all winter long.

Step 1: Check Your AC or Heat Pump Outside

Your AC worked hard this summer and it needs some care before you forget about it for several months. Start with the outdoor unit. Switch it off at the power source (not the thermostat) so you can work safely. Clear away leaves, twigs, and other debris. Wipe off dirt or bird droppings with a damp cloth.

  • For an AC unit: Let it dry completely. You can cover it if the manufacturer recommends it or you can temporarily cover it with breathable material if you are worried about leaves or other debris during fall. Just don’t leave it covered for long period of time.

  • For a heat pump: Do not cover it. Once it’s cleaned, turn the unit back on so it can keep working through the cold months.

Step 2: Clear the Space Around Your Furnace

Inside, give your furnace some breathing room. Remove any boxes, tools, or clutter within a few feet of the unit. You should particularly make sure that your air vents and returns are clear. Do a quick visual check for scratches, cracks, or other signs of wear. If anything looks off, it’s worth a call to a professional for a tune-up before winter sets in.

Step 3: Switch Out Filters

Both your AC and furnace depend on clean filters for airflow and healthy indoor air quality. Replace disposable filters or clean reusable ones. Stock up now so you’re ready for the season—most filters last about a month if you want the best air quality possible. Your furnace and AC often share the same filter, so don’t put off replacing it just because you won’t be running your AC for a while.

Step 4: Check Your Carbon Monoxide Detector

Safety comes first. Replace the batteries in your carbon monoxide detector and press the test button each month to be sure it’s working—if the sound is weak, delayed, or muffled, it’s time for a new unit. Because detectors only last 5 to 7 years, don’t forget to replace the entire device on schedule. This matters most during the heating season, when a cracked heat exchanger or other furnace problem could release carbon monoxide into your home. Taking a few minutes to check your detector gives you peace of mind that your family will stay safe through Michigan’s bitterly cold nights.

Step 5: Inspect Your Humidifier

If your home has a humidifier, give it some attention before winter dries out the air and it kicks into high gear. Clean the water panel, remove any buildup, and check that there’s no mold. Check your manufacturer’s instructions for specific cleaning and maintenance requirements for your unit. A clean humidifier keeps your indoor air more comfortable all season.

Step 6: Run a Test

Finally, test your furnace to make sure everything’s working properly.

  1. Set the thermostat to 75°F.

  2. Wait for the heat to turn on.

  3. Walk through your home and check each register.

Air should flow steadily and evenly from every vent. If some rooms feel cooler or airflow is weak, that points to a problem that needs professional attention. This test can also help you identify any odd smells or sounds that need attention. Make note of anything that seems off and bring it up during your annual furnace tune-up.

Ask an Expert to Make Sure Your Home Is Ready

By following this checklist, you’ve already given your HVAC system a strong start for winter. But if you notice problems, or you’d rather let a pro handle the details, we’re here for you. Grapids Home Services has served Grand Rapids homeowners for over 20 years, delivering five-star service with certified technicians you can trust. Our furnace tune-ups will make sure you are ready for anything that the winter can throw at you.

If you want peace of mind before the snow flies, give us a call or send us a message. We’ll make sure your home stays warm, safe, and comfortable all season long.

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