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AC Maintenance Checklist: How to Prepare Your Detroit Home for Summer

By Cregger Plumbing, Heating, Cooling & Electrical

July 20, 2026

Homeowner adjusting an air conditioner remote control, illustrating seasonal AC maintenance and cooling system preparation for summer in a Detroit-area home.

Cregger has been helping Metro Detroit homeowners get their cooling systems ready for summer since 1993. A little preparation in spring prevents a lot of frustration in July. Use this checklist to make sure your air conditioning system is ready to handle whatever Michigan summer throws at it.

Why Spring AC Maintenance Matters in Michigan

Metro Detroit summers arrive fast. Temperatures jump from mild to sweltering in a matter of weeks, and when the heat hits, HVAC companies get flooded with calls. Homeowners who schedule maintenance in March, April, or May get priority scheduling and head into summer knowing their system is in good shape. Those who wait until June or July are often stuck in a service backlog — or worse, dealing with an emergency repair during a heat wave.

Homeowner AC Maintenance Tasks

These are steps every Metro Detroit homeowner can and should do every spring:

Replace or Clean the Air Filter

A clogged air filter is the leading cause of reduced AC efficiency and premature system failures. Replace your filter at the start of cooling season and check it monthly during heavy-use months. Homes with pets or allergy sufferers should check more frequently.

Clear Debris Around the Outdoor Unit

Michigan winters leave behind leaves, dirt, twigs, and other debris around your outdoor condenser. Gently clear vegetation, cut back any plants or shrubs that have grown within two feet of the unit, and check that the unit is level. Tilted units can cause oil and refrigerant flow issues.

Check Vents and Registers

Walk through your home and confirm all supply and return vents are open and unobstructed. Blocked vents reduce airflow, strain the system, and create uneven cooling. This takes five minutes and makes a real difference.

Test the System Before You Need It

Turn on your AC on a mild spring day before temperatures spike. Run it for a full cycle and check that cool air is flowing from all vents. If the system struggles, makes unusual noises, or fails to cool, you’ll have time to call Cregger before the heat arrives.

Check the Condensate Drain Line

Your AC system produces condensation that drains through a line to the exterior or a floor drain. A clogged condensate line causes water to back up, potentially damaging the system or causing water intrusion inside your home. Pouring a cup of diluted bleach into the drain pan once a season helps prevent algae growth.

Professional AC Maintenance Tasks (Leave These to Cregger)

Some maintenance tasks require professional tools, training, and certifications. Cregger’s spring AC tune-up includes:

  • Refrigerant level check and leak inspection
  • Cleaning evaporator and condenser coils
  • Checking electrical connections and capacitors
  • Testing and calibrating the thermostat
  • Lubricating moving parts in the blower and fan motor
  • Measuring airflow and system efficiency
  • Inspecting ductwork for leaks or disconnections

How Often Should You Schedule Professional AC Maintenance?

Once a year, in spring before the cooling season begins. If your system is older than 10 years, twice-yearly checks — spring and fall — can catch developing problems before they become expensive failures.

What Happens If You Skip Annual Maintenance?

Neglected air conditioning systems lose efficiency, develop minor problems that escalate into major ones, and fail more often during peak demand. An unmaintained system can use 10–25% more energy than one that’s properly tuned — and its lifespan is typically shorter.

For Metro Detroit homeowners, that means higher bills and earlier replacement — two things no one wants.

When to Consider Replacing Rather Than Maintaining

If your system is over 12–15 years old, requires frequent repairs, or carries a SEER rating below 13, a maintenance tune-up may not be the best use of your money. Cregger will give you an honest assessment of your system’s condition and help you decide whether maintenance or replacement makes more sense for your situation.

Call Cregger in Metro Detroit today to schedule your spring AC tune-up. Serving Ferndale, Royal Oak, Birmingham, Troy, and communities across Southeast Michigan — because a well-maintained AC system is the best kind of insurance against a Michigan summer breakdown.

What Our Customers Say

kevin kosanovich avatar

kevin kosanovich

14 days ago

Great work! Cregger is a great company to use, and Josh is an excellent technician. Recommend them both!

Michael Hesano avatar

Michael Hesano

14 days ago

David was a pleasure to work with. He’s was professional, knowledgeable, and polite. He went out of his way to help me figure out a few items that didn’t relate to the matter he met me on site for. Definitely recommend.

Heather Carmona avatar

Heather Carmona

19 days ago

Patrick was very efficient and communicated well regarding status of our boiler

Alex Baylerian avatar

Alex Baylerian

21 days ago

Desmon is awesome! Very knowable, friendly, and helpful

Angela Nichols avatar

Angela Nichols

27 days ago

Timely, informative and customer-focused.

Bridget O'Brien avatar

Bridget O'Brien

1 month ago

Brian was excellent. Timely, courteous , knowledgeable and efficient. He explained the situation and his Plan. Was able to fix My plumbing problem quickly. Highly recommend

Brenda Gayle avatar

Brenda Gayle

1 month ago

Nico, Peyton and Mike came out and did an amazing job with my install. They were right on time and three worked together seamlessly. I never saw them standing around. They were very courteous and definitely knew their job. They explained things in a way that was easy to understand and asked many times if I had any questions. Both the air unit and furnace look great. They cleaned up after themselves and left nothing behind. Kudos to those three on the amazing job they did. Would definitely recommend them!!

Cristobal Varas avatar

Cristobal Varas

1 month ago

Josh, from Cregger, came to inspect my water heater. He was very professional, gave me different options and gave me an estimate for me to decide what to do next. No pressure and very much confirmed what I was thinking. With my annual service program, there was no charge for the visit

kevin Bentley avatar

kevin Bentley

1 month ago

Great work! Also very timely in coordinating with the city for water shut off and then back on. Thank you!!

Faith Frederick avatar

Faith Frederick

1 month ago

Tim was courteous, friendly and very informative. He knows his profession.

Szymon S. avatar

Szymon S.

1 month ago

David did exceptional work cleaning out the sewer pipes. He made multiple passes to ensure all roots were completely removed, and thoroughly checked his work before finishing. Would highly recommend David for any plumbing work! My condolences to him for enduring my father-in-law as a captive audience.

Matthew Dewan avatar

Matthew Dewan

1 month ago

Chris Goode did an amazing job. He was punctual, worked hard, and was a total pro. I have used Cregger many times for my boiler maintenance, and will continue to do so. Thanks.

Tom Dolnicek avatar

Tom Dolnicek

1 month ago

Tim was nice to work with, friendly and congenial. He explained the problem, identified the solution, and walked through all the steps along the way. He provided good recommendations for follow on cleanup and prevention. I’m very pleased.

James avatar

James

1 month ago

Great, professional and knowledgeable took the time out to explain to me. The codes are not codes in the efficiency value that it will bring my home.

Arvee avatar

Arvee

1 month ago

Received a very detailed and comprehensive cost estimate for some work that I am considering.

Randy Carroll avatar

Randy Carroll

1 month ago

Josh was super friendly and very professional. Hurt the pocketbook but good service is worth. 100% recommend.

marlene zieah avatar

marlene zieah

1 month ago

Joe did an amazing job helping me identify a clog in my basement shower and fixed all other issues so quickly. Beyond grateful!

Lesley Fairrow avatar

Lesley Fairrow

1 month ago

Very responsive in an emergency. The service was expensive but no more so than other plumbers we contacted. Amon was professional, knowledgeable and efficient.

John Shuell avatar

John Shuell

1 month ago

Fast and efficient, will be using them more in the future.

Eric Flowers avatar

Eric Flowers

1 month ago

Adib was prompt, courteous, and efficient. Great service.

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