AL's Cooling & Heating
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About AL's Cooling & Heating
AL's Cooling & Heating holds a perfect 5.0-star rating across 22 verified customer reviews, establishing the company among the most trusted residential HVAC contractors in DuPage County. Based in Oak Brook, Illinois, this full-service company serves the broader Chicagoland metro including Naperville, Downers Grove, Elmhurst, Hinsdale, and western suburbs. Every technician on staff maintains current licensing and insurance, adhering to municipal permit requirements specific to each community they visit. The company maintains round-the-clock availability because heating and cooling failures respect neither business hours nor holidays, guaranteeing a live voice answers every call around the clock.
What distinguishes AL's from neighboring contractors boils down to two concrete capabilities: boiler expertise and honest diagnostics. The company specializes in boiler repair and installation, a niche that many modern HVAC companies have de-emphasized in favor of forced-air systems. When Angela Sons called for a second opinion after another company quoted thousands for a full AC replacement, AL's diagnosed a repairable issue and completed the fix for under $300. Their service philosophy avoids unnecessary upsells, focusing first on solving the immediate problem economically. The company also leverages utility rebate programs, connecting homeowners with ComEd and Nicor incentives for qualifying smart thermostat installations.
Customer stories reveal responsive, named technicians who earn repeat business. When Nicholas Manzella's heating system failed on a Saturday morning, Brian walked him through troubleshooting steps that morning, then arrived Monday to complete the repair at a reasonable price, no overtime premium for weekend diagnosis. Peter Hyoung underwent home renovations while coordinating HVAC work, and Brian accommodated shifting schedules until every detail met his satisfaction. James Cunha's review notes direct owner follow-up after installation, confirming the company stands behind craftsmanship with personal accountability that larger operations cannot match.
What Customers Say
22 reviewers collectively award a perfect 5-star rating; recurring themes include honest diagnostic advice preventing costly replacements, same-day or next-day response times for urgent calls, and transparent pricing without surprise line items on final invoices.
Working Hours
| SundayToday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Services
Air Conditioning Repair & Maintenance
Emergency AC repair available 24/7 with no charges for nights, weekends, or holidays. Summer tune-ups and preventive diagnostics.
Heating System Service
Furnace and boiler repair, installation, and annual maintenance coveringall fuel types common to northern Illinois homes.
Ductless Mini-Split Installation
High-velocity and conventional ductless systems forhome additions, garages, and zones lackingexisting ductwork.
Water Heater Installation
Tank and tankless water heater options. Michael B's review specifically praises their tankless installation process from start to finish.
Smart Thermostat Setup
Professional Ecobee and Nest installation with guidance on utility rebate eligibility through ComEd and Nicor programs.
Indoor Air Quality Solutions
Whole-home humidifiers and UV germicidal light installation targeting allergen, mold, and pathogen reduction in conditioned air.