Bay City Furnace Services
Serving Bay City Homeowners Since 1984. Free Estimates on New Systems.
When the cold Michigan air settles in, you need a furnace that’s ready to keep up. At Custom Engineering, we’ve been helping homeowners and small businesses stay warm through Bay City winters and the sharp winds off Saginaw Bay since 1984.
If your furnace is blowing cold air, cycling on and off, or just not heating the way it used to, we can take a look and figure out what’s going on. We handle repairs, replacements, and new installations, and we can walk you through your options in plain language.
Thinking about upgrading to a high-efficiency furnace? We can help you choose a system that fits your home’s layout, comfort needs, and budget. We work with trusted brands and provide free estimates for installations and replacements.
As a Bay City-based team, we know what Michigan winters can throw at a heating system. Someone from our team can answer your call, and we offer same-day service when available.
Need furnace help? Contact us anytime at (989) 474-2870 or online to schedule a service.
Custom Comfort, Professional Care
What Makes Us Different?
At Custom Engineering, we will always put you first. That's why so many people in Linwood trust us time and again.
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Convenient Financing Options
We make HVAC services manageable with convenient financing options. Subject to credit approval.
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Preventative Maintenance PlansKeep your system in perfect shape all year round with our programs.
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Locally Owned & OperatedAs a proud Michigan company, we deliver honest, dependable HVAC services backed by local expertise and care.
Furnace Repair in Bay City & Surrounding Communities
We know how quickly the cold can set in here in Michigan, and how frustrating it is when your furnace isn’t working properly. Whether you’re dealing with uneven heating, strange sounds, or a system that’s running but not keeping up, we’re here to troubleshoot and get things back on track. We serve residential and commercial clients across Bay City and the surrounding communities, including rural areas, and we offer same-day furnace service when it’s available.
Furnace Installations & Replacements
When repairs no longer make sense, or you’re ready for a more efficient system, we can help you through the upgrade. We install a range of furnace types, including Trane gas models, oil systems, and Mitsubishi Electric ductless units that work well for properties without central ductwork. Free estimates are available for all installations and replacements. If upfront cost is a concern, financing is available through Wells Fargo, subject to credit approval, and extended warranty options are offered for additional equipment and labor protection.
Why Proper Furnace Sizing Matters
Choosing the right furnace size is critical for efficient home heating. An oversized furnace short-cycles and creates temperature swings; an undersized unit struggles to hold a comfortable temperature on the coldest nights. Our team looks at square footage, insulation quality, and window placement to recommend the right fit for your home. That assessment comes with your free estimate.
Every installation also needs to meet Michigan’s current energy-efficiency guidelines, which can translate to potential savings on your utility bills. We stay current on those standards so your new system is set up to perform from day one. Not sure what’s right for your space? We can walk you through your options based on your home’s size, insulation, and heating needs.
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.
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"By far the most professional and reliable company."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.
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"So grateful to them!"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.
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"They have been an excellent company to work with."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.
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"10/10 Service!"Had Customer Engineering come out to my restaurant to diagnose my furnace and walk-in freezer. Brandon and Skylar, the techs, were amazing. Extremely friendly and knowledgeable. I will be using them for all my HVAC needs moving forward.- Taylor A.
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"They did a great job!"We went through custom engineering for replacing our furnace and air conditioner. They went above and beyond to do what is best for our home. The whole team was respectful and informative. They answered any questions we had!- Allison E.
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"My experience with the company was great!"Chaz went above and beyond! He fixed my main house furnace and also advised me on my ceiling-mounted furnace in my back building. Thank you for your quick response. I will use you again!- Ann K.
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"They really came through!"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.
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"Nick was fantastic!"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.
Seasonal Furnace Maintenance in Bay City
Regular furnace maintenance helps your system run more efficiently and reduces the risk of unexpected breakdowns during the coldest months. With temperatures dropping and lake winds picking up across the Great Lakes Bay Region, having a furnace that’s ready for the season makes a real difference in day-to-day comfort.
What a Seasonal Tune-Up Covers
During a seasonal tune-up, we clean the burners, inspect the blower components, check safety controls, and examine the electrical connections. For oil furnaces, we also clear built-up soot and check the nozzle and filter, helping the system burn fuel more cleanly. Most manufacturers require documented annual maintenance to honor warranty coverage, so staying current on service protects your investment.
We offer flexible options whether you want a single annual visit or a more regular service plan. If something doesn’t look right during the tune-up, we can walk you through what we found and discuss next steps based on your furnace’s condition. Our preventative maintenance program is a practical way to stay ahead of problems before the coldest Bay City nights arrive.
Furnace Safety Checks
Safety is part of every maintenance visit, especially with gas and oil systems. Our inspections include a careful review of venting systems for carbon monoxide hazards. A cracked heat exchanger is one of the more serious risks in older furnaces. It may not produce obvious symptoms, but it can allow carbon monoxide to enter living spaces, and professional inspection is the reliable way to catch it.
We also check for gas leaks and verify that all safety controls are working. These checks apply to both gas and oil systems, each of which carries its own considerations. Carbon monoxide detectors should be tested and functioning in any home with a gas or oil furnace, and we’re glad to talk through that during your service visit.