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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

Theresa Buffa avatar

Theresa Buffa

4 days ago

Matthew was fantastic! He was thorough, explained every detail, and was wonderful to work with!

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Amy Presnell

4 days ago

Chris was amazing and was able to identify the issue that other plumbing company couldn’t. 10/10 recommend!

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Ray Opezzo

6 days ago

Stellar service, courteous staff, phone/computer contact follow up to advise tech is enroute to your job site.

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mary washnock

6 days ago

Paul is an excellent technician as well as a representative of your company. His explanations were very understandable and very much appreciated. Thank you! I will definitely call your company in the future for HVAC service and also for any plumbing and electrical services.

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WiredRM

8 days ago

Work was fast and professional, couldn't ask for more.

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ERNEST SIMMS

9 days ago

Professional, friendly, willing to explain service questions.

Pamela Morris avatar

Pamela Morris

9 days ago

Hot water heater was blinking code called came out same day and fixed it

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jeannette Benner

10 days ago

Desmon was very polite and friendly. He was efficient and got the job done.

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Amelia H.

10 days ago

Jake was great. He was fast, responsive, professional, and respectful. I like that you guys sent a photo of him beforehand, and he came in a well marked van. My hot water heater died early on a Saturday morning. You guys came out for a free consult within 4 hours of my call, and had the job completely done 3 hours after that. Happy to have it replaced so quickly and easily, thanks.

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Marcel P

11 days ago

Jacob B was outstanding. He was very personable, diagnosed the issues quickly, and did the necessary work efficiently and neatly. Left the space clean after his work.

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N Mathias

12 days ago

Alex did a great job restoring my AC. He replaced a capacitor. Thanks very much, Alex.

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Elaine Frazier

13 days ago

Our HVAC Tech Paul Bunk was professional, thorough and friendly.

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TIMOTHY NEWCOMB

15 days ago

Tim was very likable and did a great job installing the new water heater. He also had to upgrade us to new codes (our old water heater was installed in 2004!). Installation was completed same day as estimate in a very reasonable timeframe.

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Alexandria Faranso

18 days ago

Took the time to go above and beyond to help diagnose our HVAC issues!

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Alex Erley

19 days ago

Paul was great! He identified why my AC wasn’t working right away, explained everything, and fixed it quickly. Highly recommended!

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Megan Gonella

19 days ago

Jacob Becker was excellent - he explained what we needed in terms we could easily understand and ultimately saved our basement from flooding. Thank you, Jacob!!

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Bernie Wu

20 days ago

Kody was on time and was very professional as always. He cleaned up after the job was completed. Very cordial and friendly as well!

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Adean Solomon

20 days ago

Landen was very respectful and pleasant. He immediately saw the problem and fixed it very pleased with the service I received.

Rodney Barber avatar

Rodney Barber

20 days ago

It was a great experience Paul did a fantastic job he fix my AC unit got it up and running new thermostat I really appreciate yall

Orc Lord avatar

Orc Lord

20 days ago

Tim came out for me and helped. Just needed a drain snake. Professional at his work with the right equipment and knowledge. With the drain camera, he clearly explained to me what was it was showing and future tips on how to avoid more issues.

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