Is your AC not cooling, making strange noises, or cycling on and off? Our certified technicians diagnose and repair all brands in Darien and DuPage County.
When your AC breaks down in an Illinois summer, you need fast, reliable repair. Heavy Duty Heating & Cooling provides expert AC repair in Darien, IL — from refrigerant leaks to compressor issues — with honest quotes before any work begins.
Our bilingual team serves Darien with same-day appointments and 24/7 emergency service. No hidden charges. Just reliable AC repair from a family-owned business.
Locate the leak, repair it, and recharge your system properly — restoring full cooling performance.
Diagnose compressor failures and provide honest repair or replacement options at fair prices.
Quick, affordable fix for capacitors and contactors that prevent your AC from starting.
Clean, repair, or replace frozen or dirty evaporator coils to restore efficiency and airflow.
Fan motor failures, dirty condensers, and electrical faults — all diagnosed and repaired.
Inaccurate thermostat or control board causing erratic cooling — diagnosed and replaced.
Same-day & emergency service in Darien and DuPage County.
Free estimates, no hidden fees, upfront quotes before work begins.
English & Spanish service for all Darien customers.
Fully licensed, certified, and insured HVAC professionals.
Local business treating every Darien customer like a neighbor.
We stand behind every job with a satisfaction guarantee.
Most common causes: low refrigerant, dirty air filter, or faulty compressor. Call us for a fast diagnosis.
Most repairs range $150–$600. We provide free estimates before any work begins.
Yes — 24/7 emergency HVAC for Darien and DuPage County when your AC fails in extreme heat.
Most repairs are same-day. Complex jobs may take 1–2 days.
Based in Joliet — serving Will, Cook & DuPage Counties, IL.