
Commercial Rooftop Unit Maintenance in Howell, MI - Keep the Business Running
An RTU that dies during the lunch rush costs a lot more than a scheduled tune-up. We do quarterly and yearly PM programs that keep commercial units running through peak season. Call (517) 302-3764.
- Licensed & insured
- 24/7 emergency
- Authorized AirQuest Dealer
- Upfront pricing
Rooftop Unit Maintenance in Howell
Commercial rooftop units run twice as many hours as residential HVAC and take twice the abuse (sun, weather, kitchen grease, city dust, and constant demand). A scheduled maintenance program keeps them running through peak season, extends their life, and stops most emergency shutdowns before they happen.
Signs you need rooftop unit maintenance

Signs your building needs a real PM program: rising utility bills, complaints from staff or tenants that the temperature is off, uneven cooling from one end of the building to the other, water stains under RTUs, or repair calls happening more than once a year. Restaurants with hood systems and grease loads need more frequent attention because kitchen exhaust wears units out faster.
Skipping maintenance is expensive. A dirty condenser coil raises operating cost five to fifteen percent. A clogged drain floods the roof and eventually the ceiling below. A worn belt breaks in the middle of business hours. Manufacturer warranties usually require documented PM to stay valid, and a single voided warranty on a large RTU can cost tens of thousands.
We offer quarterly and semi-annual PM programs sized for the building. Every visit includes coil washes, belt and pulley inspection, refrigerant pressure checks, amp draw readings on all motors, filter changes, condensate drain flush, gas heat inspection with combustion analysis, and full controls check. We leave a written report after every visit so you have records for warranty claims and insurance.
PM ties into the rest of your commercial HVAC. If we find something serious during a visit, we handle it same-day under Rooftop Unit Repair. When a unit is truly done, we walk you through Rooftop Unit Installation. See the full offering on the Commercial HVAC hub.
Our rooftop unit maintenance options

Rooftop Unit Maintenance for Howell homes and businesses
Commercial buildings in Howell and the surrounding towns face Michigan weather extremes. Restaurants in Brighton and South Lyon deal with kitchen grease loads. Retail buildings off M-59 sit exposed to sun and wind. Offices in Ann Arbor and Lansing have long-hours occupancy that hits equipment hard.
We run PM contracts across the region, including Hartland, Fenton, Milford, and Highland.
What to expect

You get a walk-through and a written proposal with a scheduled visit calendar for the year. Visits are booked around your operating hours so the roof work does not disrupt business. Each PM visit lasts one to two hours per RTU. After every visit you get a written report with all measurements and a plain-language list of anything to watch or fix.
Why choose us for rooftop unit maintenance
Family-owned in Howell with commercial experience. Michigan Mechanical License No. 7119201, insured, Authorized AirQuest Dealer, twenty-plus years of owner experience. PM programs written for the building, not a one-size-fits-all package. Upfront pricing. Same-day emergency service for PM customers.
Rooftop Unit Maintenance questions Howell homeowners ask
How fast can you get out for rooftop unit maintenance in Howell?
Most rooftop unit maintenance calls in Howell and the surrounding Livingston County towns are handled the same day. Call (517) 302-3764 and we will give you a real arrival window, not a four-hour block.
Do you charge a diagnostic fee for rooftop unit maintenance?
Yes, there is a flat diagnostic fee for the trip and the time it takes to identify the problem. If you approve the repair, we roll that fee into the total. You always see the number before we start work.
Are you licensed and insured?
Great Lakes Comfort holds Michigan Mechanical Contractor License No. 7119201 and carries full liability and workers' comp insurance. We pull permits when the job requires one.
Do you offer financing on rooftop unit maintenance?
We offer financing on qualifying installations and larger repairs, including 0% promotional plans for approved credit. Ask when you call and we will walk you through the options.
Rooftop Unit Maintenance across Howell and Livingston County
Based in Howell, MI - dispatching to Brighton, Hartland, Fenton, Milford, South Lyon, and the surrounding communities.
Request service - we'll respond within 48 hours.
Need help faster? Give us a call - a real person answers 24/7 and we can often get you on the same-day schedule.
Not urgent? Fill out the form and we'll get back to you within 48 hours (usually much sooner during business hours).
Call (517) 302-3764Open 24 hours - 7 days a week
Get help today
Do not wait for a broken RTU to shut the business down. Call (517) 302-3764 today to set up a commercial PM program.
See what we do at Great Lakes Comfort, your local HVAC contractor in Howell, MI.
