
Bay City AC Repair
Serving the Great Lakes Bay Region with Our AC Repair Services
At Custom Engineering, we’ve been helping homeowners in Bay City, Saginaw, and Midland Counties stay cool and comfortable since 1984. As a locally owned HVAC company, we understand Michigan's unpredictable weather and take a straightforward, personal approach to every repair.
We’re always just a phone call away—whether it's a quick question or an urgent repair. If your AC is blowing warm air, running constantly, or making strange noises, it’s time to have it looked at. Whether you're in Bay City, Midland, Saginaw, or nearby, we’re right here, ready to assist.
Living and working in the Great Lakes Bay Region ourselves, we know how sticky Michigan summers can be. That's why we're committed to keeping your home comfortable without the runaround. Whether you’re in Essexville, Auburn, or Freeland, you’ll get honest, reliable service from a team that treats you like a neighbor, not a number.
Need fast AC repair in Bay City or nearby? Call us today at (989) 474-2870 to help restore comfort to your home.

Custom Comfort, Professional Care
What Makes Us Different?
At Custom Engineering, we will always put you first. That's why so many people in Bay City trust us time and again.
-
Affordable Financing OptionsWe make HVAC services affordable with financing options offering 0% interest for 72 months.
-
Available Nights & WeekendsNo matter when you need us, we're ready to help. Someone is always available to answer your call.
-
Preventative Maintenance PlansKeep your system in perfect shape all year round with our programs.
-
Locally Owned & OperatedAs a proud Michigan company, we deliver honest, dependable HVAC services backed by local expertise and care.
Our AC Repair Services
Not every AC issue is obvious. Sometimes it’s a sudden lack of cool air, other times it’s strange sounds, a thermostat that’s not responding, or rooms that just don’t feel right. Whether you live in Bay City, Saginaw, Midland, or a nearby town, we’re here to help you figure out what’s happening.
We work on all types of home cooling systems, from traditional ducted AC units to ductless mini-splits and heat pumps. If you’ve got a high-efficiency Trane or Mitsubishi Electric system, we know our way around those too.
Common AC problems we handle:
- Low refrigerant or leaking lines
- Frozen coils
- Thermostat glitches
- Blocked drain lines or dirty filters
- Faulty capacitors or blower motors
- Uneven temperatures throughout the house
If your home doesn’t feel like it’s cooling the way it should, we’re ready to take a look, explain what we find, and walk you through what comes next.


Trusted by homeowners and Businesses Since 1984
At Custom Engineering, your satisfaction is our priority! See for yourself what our customers have to say about working with us.
-
Every employee I have had the pleasure of dealing with has been top-notch. Today's visit by Tyler for annual maintenance was great. He was punctual, friendly, and professional.- Michelle G.
-
Quick, efficient, and friendly service from both office staff and techs. Fair pricing. Grateful for their help on a freezing day when our furnace failed. Feared the worst. Highly recommend this company!- Tammie S.
-
We bought our kitchen hood system from them, which they also installed (no small task). They are dependable, efficient, and do great work. Prices are what I would expect for the job. Don't hesitate to hire them.- Marinell S.
-
I always try to keep my business local, so I called Custom Engineering. They always answered my calls promptly, and the service was friendly with experienced technicians. They were prompt, courteous, and really put my fears to rest. Great job!- Debbie M.
-
I needed help, and Custom Engineering got to me fast and saved the day. Nick, the technician, was great. He was personable and intelligent and he got my repair done super fast. Thanks, Custom Engineering!- James T.
-
Chaz did an amazing job - straightforward and very helpful. Jason and Trey set up the furnace a week ago, and it runs amazingly! It's nice to stay warm again. They just repaired and replaced my bathroom exhaust fan, too. Thank you again!- Cesily W.
-
He got our furnace up and running again very quickly (on a Saturday!). Very personable and professional! We will definitely be using Custom Engineering Heating & Cooling again - thank you!- Krista W.
-
Always courteous & competent. They installed a new furnace, AC, garage gas heater, and ran a gas line into our laundry room. They stayed on the job until all was completed and we were extremely satisfied.- Terrance V.
Should You Repair or Replace Your AC?
If your air conditioner has been breaking down frequently or approaching the 10–15-year mark, it could be time to think about a replacement. No need to make a guess, we’ll assess your system, discuss what’s been happening, and help you make an informed decision.
We install high-efficiency systems from Trane and Mitsubishi Electric, and all our installations come with a 5-year labor warranty.
What Makes Our AC Repair Services Different
We believe in simple, straight-up service. If a replacement is needed, we’ll guide you through the process with transparency and no pressure.
Here’s what you’ll get when you work with us:
- Real help from a local team who’s seen it all
- 24/7 support with someone always available to take your call and walk you through basic troubleshooting if you’re not sure what’s wrong
- Same-day and emergency repair availability when available
- Financing options with 0% interest through Wells Fargo
We’re here to make the process less overwhelming and help you stay comfortable in your space.
Contact us today at (989) 474-2870 or online to schedule your AC repair service.