Thinking about tackling a new AC install? It’s a big project, but it’s manageable if you know the “order of operations.” Whether you’re a dedicated DIYer looking to prep the site or you just want to know what your contractor is doing in the backyard, this guide breaks down the process.
At Mrs. Michael, we believe a cool home in July starts with a smart plan in May. Here is how to get reliable cooling the first time—and how to spot when it’s time to put the wrench down and call in a pro.
Before You Pick Up a Wrench: The “Michigan Essentials”
Installing central AC is about more than just plopping a metal box on a plastic pad. In Michigan, we have specific rules (and specific weather) to keep in mind:
- The Permit Paperwork: Most Michigan townships require a mechanical permit. It might feel like a chore, but it’s your safety net to ensure the job was done safely.
- The “Fluff” Factor: If you live in Lansing or Ann Arbor, you know “Cottonwood Season.” Plan your unit location away from the thickest drifts and prepare to rinse those coils every spring.
- The Law on Refrigerant: Federal law (EPA Section 608) requires a license to handle refrigerant. This isn’t just a suggestion—it’s a safety requirement. This is the part you always leave to a pro.
- Don’t Guess on Size: Bigger isn’t better. An oversized AC turns on and off constantly (short-cycling), leaving your house humid and your energy bill high. Ask for a Manual J calculation to find your home’s “Goldilocks” size.
Step-by-Step: The Road to Cold Air
1. Site Prep (The Homeowner Sweet Spot)
This is where you can really help out and save some labor time. Pick a spot that is level and well-drained.
- Pro Tip: Keep the unit 12–24 inches away from the wall and clear of dryer vents (lint is an AC killer!).
- The Michigan Move: Elevate the unit slightly on a sturdy pad so snow doesn’t bury the coils in the depths of January.
2. Electrical & Safety
Safety first—period. You’ll need a weatherproof “disconnect” box within sight of the unit. If your electrical panel looks like a bird’s nest or is already maxed out, have an electrician take a look. It’s much cheaper to upgrade a breaker now than to fix a fire later.
3. The “Vitals”: Line Sets & Drains
The line set carries the “cool” into your home. Avoid tight kinks in the copper—think of them like a kinked garden hose. Inside, make sure your condensate drain slopes downward. If that drain clogs in an attic install, you’ll have a ceiling leak before you know it. We always recommend a float switch (an emergency shut-off) to prevent water damage.
4. The Technical Finish (Pro Territory)
Once the units are set, a licensed tech should take over for the “heart surgery” of the system. We use specialized tools to perform a Nitrogen Purge, which keeps the inside of the pipes clean while we weld. Then, we pull a Deep Vacuum to remove every drop of moisture. Even a tiny bit of water inside the system can turn into acid and eat your compressor from the inside out. Finally, we weigh in the refrigerant to the exact ounce.
Knowing When to DIY vs. Call a Pro
A lot of homeowners ask where the “handshake” happens between DIY work and professional expertise.
You can safely handle the prep work: leveling the ground, setting the pad, installing decorative line-set covers, routing the PVC drain line, and mounting the thermostat.
However, you should always call in a licensed expert for the technical heavy lifting: handling and charging refrigerant, high-voltage electrical wiring, brazing copper joints, and the final “commissioning” to ensure the pressures and airflow are perfect for your ductwork.
Common Michigan Pitfalls to Avoid
- Reusing Old Lines: If your old AC died a “natural death,” the old copper lines might be full of contaminated oil. Usually, it’s best to start fresh.
- Skipping the Filter: A high-quality 4-inch media filter is a game-changer for Michigan allergies.
- Ignoring the “Hum”: If your new unit sounds like a jet engine, something is wrong with the airflow. A good install should be seen, not heard.
Why Neighbors Trust Mrs. Michael
We know that inviting someone into your home is a big deal. That’s why we do things a little differently:
- No Surprises: You’ll get a photo and bio of your technician before they arrive.
- Clean & Tidy: We treat your floor like our own (booties are mandatory!).
- Expertly Done: We don’t just “hook it up.” We measure static pressure and airflow to ensure your system lives a long, happy life.
“John just left my house and he was fantastic… He explained how my air conditioner didn’t work, what happened, and what likely caused the part to go bad.” — Kristen T.
Ready to stay cool?
Whether you need a second opinion on a DIY project or a full, hands-off professional installation, our team is across the street and ready to help.
Call us today: 810-673-7459
Book Online: www.mrsmichael.com
Serving Lansing, Ann Arbor, and Mid-Michigan with 5-star service you can actually trust.