Rooftop HVAC Unit Service in Chicago, IL
Specialized rooftop unit repair, replacement, and maintenance for Chicago retail, offices, and restaurants.
Rooftop units are the workhorses of Chicago's commercial buildings — and because they're out of sight, they're often out of mind until they fail. Polar Refrigeration & Air Control specializes in rooftop unit (RTU) repair, replacement, and maintenance for retail, office, restaurant, and industrial buildings across Chicagoland.
RTUs endure the full brunt of Chicago weather — brutal cold, heavy snow load, humid heat, and constant sun — which makes proactive maintenance the difference between planned upkeep and an emergency during business hours. Our technicians handle the access, safety, and logistics that rooftop work requires, and we service packaged units of all sizes.
From a single-store RTU to a multi-unit commercial roof, we keep your rooftop systems running efficiently and step in fast when they don't.
Signs Your RTU Needs Service
- Inconsistent heating or cooling in the space below
- The unit short-cycles or runs constantly
- Rising energy costs from an inefficient system
- Unusual noise, vibration, or belt squeal from the roof
- Refrigerant or economizer problems
- Water leaks appearing at the roof curb or ceiling
- An aging unit with mounting repair costs
Why RTUs Need Proactive Maintenance
A rooftop unit hides its problems well. Dirty coils, worn belts, failing economizers, and drainage issues quietly rob efficiency and creep toward failure — usually surfacing on the hottest or coldest day, mid-business-hours. Scheduled maintenance catches these early, keeps energy costs down, and extends the unit's service life by years.
Our maintenance covers the components that matter: filters, belts, bearings, coils, refrigerant charge, economizer operation, drainage, electrical connections, and safety controls. Documented service also supports your budgeting and compliance.
- Coil cleaning and refrigerant checks
- Belt, bearing, and motor service
- Economizer and control diagnostics
- Condensate drainage and curb inspection
- Filter programs and electrical checks
Repair, Replace, or Retrofit
When an RTU nears the end of its life, we help you weigh continued repairs against replacement and available high-efficiency options. Replacement can dramatically lower operating costs, and we handle the full project — crane logistics, curb adapters, permits, and startup — scheduled to minimize impact on your business. When repair is the better call, we make it and keep you running.
Our Rooftop Unit Service Process
Rooftop assessment
We safely access and inspect the unit, curb, and connections, and evaluate the system's condition and performance.
Clear recommendation
You get a written scope — repair, maintenance, or replacement — with honest guidance based on the unit's age and condition.
Efficient execution
We handle access logistics, crane coordination for replacements, permits, and code-compliant work with minimal disruption below.
Preventive maintenance
We set up scheduled service — filters, belts, coils, controls, drainage — to maximize uptime and unit life.
What Affects the Cost
RTU service is quoted per project based on unit size, access, and scope. Here's what drives the cost.
Unit size and tonnage
Larger RTUs mean more parts, refrigerant, and labor for both repair and replacement.
Roof access and logistics
Crane requirements for replacement, roof access, and safety setup factor into the total.
Repair vs. replacement
A component repair is far less than a full unit changeover with curb adapters and startup.
Maintenance agreement
Contract customers receive priority service and pricing that reduces long-term costs.
Why Choose Polar for Rooftop HVAC in Chicago
Rooftop Unit (RTU) Service is only as good as the crew behind it. Here's what Chicago homeowners and businesses get when they call Polar Refrigeration & Air Control instead of a general handyman or an out-of-town outfit.
24/7 response you can count on
A 60-minute call-back on emergencies and same-day dispatch whenever weather and volume allow — because rooftop hvac problems rarely wait for business hours.
Licensed, insured & EPA 608 certified
Refrigerant work is handled by EPA Section 608 certified technicians, and we pull the required Chicago mechanical permits so the job is done to code and on the record.
4.8★ across 43 reviews
Real Chicagoland homeowners and business owners rate us for showing up on time, explaining the work in plain language, and standing behind it with a written guarantee.
Upfront pricing & honest advice
You get a clear, written quote before any work begins — plus financing options and a genuine repair-first assessment, never a pressure pitch to replace.
Rooftop HVAC Across Chicagoland
We provide rooftop unit (rtu) service throughout Chicago and the surrounding suburbs — from the city's bungalows and two-flats to North Shore homes and commercial buildings across Cook County and beyond. Popular areas include Rooftop HVAC in Cook County, Rooftop HVAC in Evanston, Rooftop HVAC in Oak Park, Rooftop HVAC in Cicero, Rooftop HVAC in Berwyn, and Rooftop HVAC in Skokie. Our technicians know how the region's housing stock and lake-influenced climate affect comfort systems, so you get service tuned to your building — not a one-size-fits-all visit. Don't see your community? View all service areas or call us to confirm coverage to your address.
Related Services
Commercial HVAC Services
Rooftop units, split systems, and light-commercial HVAC installed, repaired, and maintained to keep your business open.
Learn moreCommercial Refrigeration
Walk-in coolers, freezers, reach-ins, and prep tables — repaired, installed, and maintained to protect your inventory 24/7.
Learn moreHVAC Maintenance & Tune-Ups
Seasonal tune-ups and maintenance plans that prevent breakdowns, cut energy bills, and protect your warranty.
Learn moreAnswers
Frequently Asked Questions
Common questions about rooftop hvac in Chicago.
At least twice a year — before the cooling season and before the heating season — is the standard for commercial RTUs, given how hard Chicago weather is on them. Regular service prevents most business-hours breakdowns and keeps energy costs in check.
In most cases, yes. We plan RTU replacements around your operating hours — including after-hours or overnight — and coordinate crane and access logistics to minimize disruption to your business and customers.
With good maintenance, commercial RTUs typically last around 15–20 years, though Chicago's harsh weather and neglected service can shorten that. We help you decide when continued repairs no longer make sense versus a more efficient replacement.
Yes. Packaged RTUs provide both heating and cooling, and we service the complete unit — compressors, heat exchangers, economizers, controls, and more — as well as any attached refrigeration or exhaust equipment.
Yes. We coordinate crane logistics, curb adapters, roof access, and safety setup for rooftop unit replacements, and we schedule the work around your business hours — including after-hours — to keep disruption to a minimum.
With regular maintenance, commercial rooftop units typically last around 15 to 20 years, though Chicago's freeze-thaw cycles, snow load, and humid summers can shorten that when service is skipped. We help you weigh continued repairs against a more efficient replacement once an aging unit's costs start to climb.
Ready for Reliable Comfort? Get a Free Estimate
Same-day service available. Call now or request your free, no-obligation quote — our licensed, insured team is standing by 24/7.