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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

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James

4 days 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.

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marlene zieah

4 days ago

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

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Lesley Fairrow

5 days 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.

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John Shuell

7 days ago

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

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Eric Flowers

8 days ago

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

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Christian Meeks

11 days ago

Very timely scheduling, great insight and very communicative. Definitely a professional who had my best interests in mind

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Cole Seiler

11 days ago

Jayden was wonderful to work with and accommodated our work schedules and arrived earlier in the day. 10/10

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Dan Brochstein

12 days ago

Jake was very courteous, spent time to educate us and delivered great service!

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Debbie C

12 days ago

Joe C. Installed and ran gas and water lines for appliances. He was professional, well versed in his trade and very friendly. I would highly recommend Cregger Plumbing.

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Jenny Bailey

15 days ago

Matt was great ! The quote was a little high so we passed on it but Matt was very professional and polite !

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Julie Lynch

15 days ago

Jacob Becker did an AMAZING job! He was extremely professional, super nice and a joy to work with!

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Sarah Carlson

15 days ago

Ethan was fantastic! He did a great job and I’ve been really happy with using Creggers.

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Linda Weathers

16 days ago

Patrick was friendly, quick and very efficient!!

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Mike Laske

18 days ago

Ethan was excellent I would highly recommend him.

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Sandra Paran

19 days ago

Prompt Thorough Educational - options given

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ADWHITT1007

21 days ago

Cregger Plumbing did a great job on cleaning out my drain line. They were easy to contact and quickly came out to the house. Ethan was the technician and he did a great job. He was personable and easy to talk to. He made sure he was careful and clean inside the house. Overall experience with Cregger was excellent!!

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Cynthia Post

22 days ago

Adib,was very friendly and very efficient and through.He checked everything and made sure everything was running .I would recommend his services.

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charmayne quiggle

28 days ago

excellent customer service ! Jake is super nice guy.!

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Tom Schoenberg

1 month ago

CREGGER showed up for us when we were in a major bind. We had a plumbing emergency requiring special parts days before hosting a big party. CREGGER did everything they could to get us sorted fast, communicated the whole time, and did a great job.

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Michael Sarka

1 month ago

Collen was very helpful and answered all of my questions

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