Rooftop Unit (RTU) Services
Reliable commercial HVAC expertise.
- Emergency Service
- Est. 1990
- Family-Owned for 3 Generations
- Father & Son Operated
Why Commercial Properties Choose AccuMax for RTU Support
Rooftop units are the workhorses of commercial HVAC—but when they fail, your building's comfort and operations grind to a halt. AccuMax, Inc. provides specialized rooftop unit (RTU) repair, maintenance, and support for units up to 20 tons. Whether your RTU won't start, is leaking refrigerant, making unusual sounds, or needs routine service, our technicians bring commercial HVAC expertise to every visit. Fast response, thorough diagnosis, and professional repairs get your building comfortable again. We serve Naperville, Downers Grove, Plainfield, Batavia, and Oak Brook.
Specialized Commercial HVAC Expertise
Rooftop units require different knowledge than residential systems. Our technicians understand unit controls, refrigerant charging for commercial equipment, three-phase electrical systems, and the high-capacity design of RTUs. We diagnose and fix commercial systems correctly.
Fast Response to Critical Problems
A failed RTU affects every office, tenant, or customer in your building. We prioritize commercial calls and respond quickly. Emergency service availability means your building isn't without climate control longer than necessary.
Honest Maintenance & Repair Guidance
Preventive maintenance keeps RTUs running longer. We perform thorough inspections, catch problems early, and help you decide whether repairs are worthwhile or replacement is more cost-effective for aging units.
Compliance & Documentation
Commercial HVAC work often requires permits and inspection. We handle compliance and keep complete service records that document maintenance and repairs. Your building stays compliant and your records stay current.
Rooftop Unit Service Options
Explore repair, maintenance, and commercial HVAC support for your RTU system.
Request Your Rooftop Unit Service
Rooftop Unit Services from AccuMax
RTU Emergency Repair & Diagnostics
Rooftop units fail for many reasons: refrigerant leaks, compressor problems, electrical failures, thermostat malfunctions, or ductwork damage. We respond quickly, diagnose the exact problem, and quote repairs upfront before any work begins.
Common RTU Repairs:
- Refrigerant leaks and recharge
- Compressor and motor failure
- Thermostat and control problems
- Capacitor and electrical component replacement
- Belt and bearing service
- Ductwork and connection repair
Benefits of Professional Diagnosis:
- Fast identification of the actual problem
- Upfront quoting before repair work
- Minimal downtime for your building
- Expert solutions designed for commercial equipment
- Documentation for maintenance records
Preventive Maintenance Programs
Regular maintenance prevents many emergency failures. We perform comprehensive RTU inspections, clean components, test operation, and address minor issues before they become major problems.
Maintenance Includes:
- Seasonal inspection of all RTU components
- Coil cleaning and airflow verification
- Refrigerant level and charge testing
- Electrical connection and control verification
- Belt inspection and replacement if needed
- Filter replacement and system optimization
- Complete service report and recommendations
Benefits of Routine Maintenance:
- Extends RTU lifespan significantly
- Improves energy efficiency and reduces operating costs
- Prevents emergency failures during critical seasons
- Maintains manufacturer warranty compliance where applicable
- Catches small problems before they become expensive
RTU Replacement & New Installation
If your RTU is aging, fails frequently, or is beyond cost-effective repair, we can help select and install a replacement. Modern rooftop units offer improved efficiency, better controls, and quieter operation.
Installation Services:
- Equipment assessment and capacity calculation
- Unit selection matching your building's load requirements
- Professional removal of old RTU
- Foundation and mounting installation
- Connection to ductwork and electrical systems
- Refrigerant charging to specifications
- Testing and commissioning
- Complete documentation and training
How AccuMax Handles Rooftop Unit Service
Emergency Call & Quick Initial Assessment
You call us describing the RTU problem. We ask diagnostic questions about the unit's behavior: Is it making noise? Not starting? Leaking? Not cooling the building? We arrive prepared with diagnostic tools and likely repair parts.
- Technician responds quickly to your service request
- Initial assessment on-site identifies likely issues
- Discussion of building occupancy and climate needs
- Preparation for repair or maintenance work
Thorough RTU Inspection & Diagnosis
Our commercial HVAC technician inspects the entire RTU: compressor operation, refrigerant levels, electrical connections, thermostat function, motor operation, and ductwork integrity. We measure pressures, test controls, and identify the exact problem.
- Complete visual inspection of rooftop unit
- Refrigerant pressure and charge testing
- Electrical continuity and component testing
- Control and thermostat verification
- Full system diagnostic report
Explain Options & Provide Repair Quote
We explain what's wrong, what caused it, and what fixing it requires. We quote repair costs upfront. If repair doesn't make financial sense compared to replacement, we present both options with cost analysis.
- Clear explanation of the diagnosed problem
- Written quote showing labor and parts costs
- Cost comparison if replacement is an option
- Recommendations based on unit age and condition
- No surprises—you decide with full cost information
Perform the Repair or Maintenance
We complete the work professionally, using quality parts and proper techniques. For repairs, we test thoroughly to confirm normal operation. For maintenance, we clean components, test all systems, and optimize performance.
- Professional repair or maintenance service
- Quality replacement parts appropriate to the unit
- Complete system testing and operation verification
- Performance measurements and optimization
- Building occupant notification if needed
Documentation, Training & Ongoing Support
We provide complete documentation of all work performed. We discuss future maintenance needs and help you plan preventive service. We answer questions about unit operation and discuss financing or maintenance plan options.
- Written service report and parts documentation
- Maintenance recommendations and timeline
- Training on unit operation if requested
- Discussion of maintenance plan benefits
- Follow-up support and scheduling next service
Affordable Financing for Rooftop Unit Repair & Replacement
RTU repair and replacement can be a significant investment for your commercial property. AccuMax, Inc. offers flexible financing through Service Finance Company to help spread costs and keep your building's HVAC systems in peak condition without straining your budget.
Flexible Financing Through Service Finance
With approved credit from Service Finance Company, you'll enjoy:
Replace or upgrade your HVAC system without the sticker shock. Break the cost into affordable monthly payments that fit comfortably in your budget.
What you see is what you pay. Your financing terms are laid out clearly from day one, with no surprise charges down the road.
Check your balance, view statements, and make payments anytime through Service Finance's secure online portal — no phone calls or paperwork required.
Qualified homeowners may be eligible for promotional rates, including low-interest and deferred-payment options. Ask us about current offers when you schedule your estimate.
Questions about financing? Call us at (630) 800-1598 and we'll help you find the right option before you commit.
Rebates Available on Heat Pump Systems
Aurora homeowners upgrading to a qualifying heat pump system may be eligible for up to $2,000 in available rebates. Rebate programs and eligibility requirements change regularly based on manufacturer and utility incentive schedules. Contact AccuMax, Inc. early in your project — we'll help you identify what's currently available for your home and make sure you capture every rebate dollar before the opportunity closes.
Keep Your Rooftop Units Running at Peak Efficiency
Preventive maintenance is the most cost-effective way to manage your commercial RTU systems. An AccuMax, Inc. maintenance plan keeps your rooftop units operating efficiently, prevents emergency failures, and extends equipment lifespan significantly.
Take $40 off a second plan if you have another system. Cancel any time — the unused portion of your dues is refunded.
Our HVAC Specials & Seasonal Offers
AccuMax, Inc. regularly offers seasonal specials and savings for homeowners in Aurora, Naperville, Downers Grove, and throughout our service area. Whether you're scheduling a tune-up, planning a system replacement, or looking to improve your indoor air quality, there's often a current offer that can help you save.
$149 Value Menu
Add any service from our Value Menu for just $149 when we're already at your home. Every option is one flat price — see how much you save compared to regular rates. Ask your technician about available add-ons at your next visit.
See the Value MenuOriginal Price
Questions About Rooftop Unit Service
Quarterly maintenance (spring, summer, fall, winter seasonal checks) is ideal for most units. At minimum, service before peak heating and cooling seasons. Regular service prevents emergency failures and extends unit lifespan significantly.
Repair fixes the specific problem while the unit operates. Replacement means installing a new unit. If a unit is 15+ years old, breaks frequently, or repair costs exceed 40% of replacement cost, replacement often makes financial sense. We'll show you both costs.
Seasonal maintenance plans are more affordable than emergency repairs. Preventive maintenance typically costs less than emergency calls. We provide pricing during the consultation based on your unit size, age, and service history.
Our expertise covers RTUs up to 20 tons. For larger commercial units or specialty systems, we can refer you to appropriate contractors or discuss specific system needs.
Call us immediately. We respond to emergency calls during business hours and can discuss after-hours options based on demand. Building comfort is critical—we prioritize getting your system back up quickly.
Replacement typically requires permits and inspection. Repairs usually don't. We handle permit applications as needed and ensure your work complies with all codes.
Rooftop Unit Service Across Aurora & the Western Chicago Suburbs
AccuMax, Inc. provides commercial rooftop unit service throughout Aurora and the western suburbs — responding quickly to commercial properties needing expert RTU repair, maintenance, and replacement support.
Additional Communities Served
Don't see your city listed? We serve many additional communities throughout the western suburbs — contact us to confirm availability in your area.
Enhance Your Commercial HVAC Solution
Rooftop units work as part of your complete building systems. Keep every component performing at its best.
Schedule Your Rooftop Unit Service Call Today
Professional rooftop unit service keeps your building comfortable, efficient, and complaint-free. Whether you need emergency repair, routine maintenance, or planning for replacement, AccuMax, Inc. brings specialized commercial HVAC expertise to every job.
Ready to ensure your RTU is in peak condition? Schedule a rooftop unit service call to discuss repair, maintenance, or replacement options. We'll assess your unit, explain options, and help you plan cost-effective service that keeps your building operating smoothly.
Family-Owned Since 1990
Three generations of HVAC expertise rooted in Aurora
Commercial RTU Specialists
Specialized expertise for units up to 20 tons
Emergency Service Available
Fast response when your building needs it most
Full-Service Commercial HVAC
Repair, maintenance, and replacement under one roof
Community-First Values
Locally based, personally accountable, invested in Aurora