Same-day service, free estimates, and 24/7 emergency support. Licensed & certified technicians serving Modesto and surrounding areas.
From emergency repairs to full system installations, we handle everything for residential and commercial properties in Modesto, CA.
Comprehensive cooling system services for residential and commercial properties. All major brands serviced with genuine parts and a satisfaction guarantee.
Request Service →Furnace repair, installation, and maintenance for all major brands. Keep your family warm all winter with our expert heating solutions.
Request Service →Seasonal tune-ups, preventative care, and service plans to extend the life of your system and improve energy efficiency year-round.
Request Service →Air purifiers, filtration systems, and duct cleaning services for healthier indoor air. Breathe cleaner, feel better at home and work.
Request Service →Smart thermostat upgrades and programming. Save energy and money with modern, connected controls for your HVAC system.
Request Service →Specialized services for businesses and industrial facilities. Minimize downtime with fast, reliable commercial HVAC solutions in Modesto.
Request Service →We bring experience, honesty, and fast service to every job — no matter the size.
Call before noon and we'll be there today. HVAC emergencies can't wait — and neither do we.
No surprises. We'll give you a clear, upfront quote before any work begins.
Our team is fully licensed, insured, and trained on all major HVAC brands and systems.
HVAC problems don't keep business hours. We're available around the clock for urgent repairs.
Real feedback from real Modesto homeowners and business owners.
"CoolTech came out same day when our AC went out in the middle of summer. Fast, professional, and very fairly priced. Highly recommend!"
"They installed a new smart thermostat and tuned up my whole system. My energy bill went down noticeably the next month. Great team!"
"Our office HVAC broke down on a Friday afternoon. CoolTech had it fixed by end of day so we could open Monday without issues. Lifesavers!"
We provide fast HVAC service throughout the Modesto area. If you don't see your city, give us a call — we likely cover it!
Stay informed and keep your system running at its best all year long.
Modesto summers are intense. Here's how to get your system ready before the heat hits.
Don't wait until it breaks down completely. Watch for these early warning signs.
Simple steps that can cut your energy bill while keeping your home comfortable.
Fill out the form and we'll get back to you shortly — or call us directly for same-day service.