HVAC emergencies don't wait for business hours. When heating or cooling fails in Darien, Heavy Duty Heating & Cooling is available 24/7 — including nights, weekends, and holidays.
An HVAC breakdown in extreme heat or cold is more than uncomfortable — it can be dangerous. Heavy Duty Heating & Cooling provides 24/7 emergency HVAC throughout Darien and DuPage County. When you call, a real person answers — not voicemail. We dispatch fast and arrive ready to repair.
Our emergency vehicles carry common HVAC parts, enabling same-visit repairs for most Darien emergency calls. Transparent pricing even after hours — no surprise emergency fees.
AC failure in extreme summer heat — we prioritize your call and dispatch immediately to Darien.
Furnace failure in an Illinois winter is a safety emergency. Priority response for no-heat calls.
If you smell gas, leave and call 911 first. Once safe, we provide emergency furnace service.
We service Darien after hours, weekends, and holidays — because emergencies don't follow schedules.
Cold-weather HVAC failures can cause frozen pipes. Emergency heating restoration prevents serious damage.
Restaurants and businesses in Darien can't afford HVAC downtime. Commercial emergency response available.
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.
Yes. We answer and dispatch around the clock for genuine emergencies in Darien and DuPage County.
We aim for same-day response with priority dispatch during extreme weather conditions.
We charge fair rates. We always provide a clear estimate before beginning any work.
No heat in freezing temps, no AC in extreme heat, gas odor, or complete system failure all qualify.
Based in Joliet — serving Will, Cook & DuPage Counties, IL.