Skip to content 
The Most Trusted HVAC Contractor in Modesto, CA
Since 2001, Dycus Heating & Air Conditioning has kept Modesto homes and businesses comfortable, one honest repair at a time. Founded by David Dycus, a NATE-certified technician with decades of hands-on HVAC experience, our family-owned company serves homeowners and light commercial clients across Stanislaus County. From fast AC repairs on the hottest days of summer to full system installs, indoor air quality upgrades, VRF systems, and commercial HVAC for local businesses, we handle every job with straightforward pricing and skilled HVAC services.
Air Conditioning Services
Modesto summers push past 105°F, and a struggling AC system can turn your home into a sauna fast. Dycus Heating and Air Conditioning keeps you cool with dependable air conditioning repair, installation, and tune-ups built for Central Valley heat. Our NATE-certified technicians diagnose problems accurately, install energy-efficient systems sized right for your home, and keep everything running smoothly through peak season.
- 01AC Repair
- 02AC Installation & Replacement
- 03AC Maintenance & Tune-Ups
- 04Ductless Mini-Split Installation
- 05Ductless Mini-Split Repair
- 06Ductless Mini-Split Maintenance
- 07Heat Pump Installation
- 08Heat Pump Repair
- 09Heat Pump Maintenance
- 10Smart & Wi-Fi Thermostats
- 11Zoning Systems
Heating Services
When Valley fog rolls in and temperatures drop, your furnace needs to work without hesitation. Dycus Heating and Air Conditioning installs, repairs, and maintains heating systems built to handle Modesto winters, from natural gas furnaces to heat pumps. We catch small issues before they turn into no-heat emergencies, keeping your family warm and your energy bills in check all season long.
Indoor Air Quality Services
The air inside your Modesto home carries dust, pollen, and airborne particles common across the Central Valley more often than you'd think. Dycus Heating and Air Conditioning improves what you breathe with indoor air quality testing, whole-home filtration, humidity control, and duct cleaning. Whether allergies flare up every spring or your ducts haven't been touched in years, we help your home feel fresher, healthier, and easier to breathe in.
Water Heater Services
Cold showers never happen at a good time. Dycus Heating and Air Conditioning repairs and installs both tank and tankless water heaters, so hot water is there the moment you turn the tap. We size every system to your household's usage, catch failing components before they leak, and keep tankless units running efficiently for years of steady, on-demand hot water.
VRF Systems
Not every building cools evenly with a standard split system, and that's where VRF comes in. Dycus Heating and Air Conditioning installs and services Variable Refrigerant Flow systems for homes and businesses across Modesto, giving every room or zone its own precise temperature control. Our Daikin VRV-certified technicians design layouts that maximize efficiency, whether you're retrofitting an older property or building new.
- 01Residential VRF Systems
- 02Commercial VRF Systems
- 03VRF System Design & Installation
- 04Zoned Temperature Control
Commercial & Light Commercial HVAC
Modesto businesses can't afford downtime, and neither can your HVAC system. Dycus Heating and Air Conditioning handles light commercial heating and cooling for offices, restaurants, retail spaces, and property managers across Stanislaus and San Joaquin counties. From new construction to full system replacements, our team keeps rooftop units, chillers, and cooling towers running so your operation never skips a beat.
- 01Commercial HVAC Installation & Replacement
- 02Commercial HVAC Repair
- 03Commercial HVAC Maintenance
- 04New Construction HVAC
- 05Rooftop Units, Chillers & Cooling Towers
- 06Commercial Refrigeration
Give Us a Call Today to Schedule Your Air Conditioning or Heating Services!
Ready for a Modesto HVAC contractor who shows up, tells you the truth, and does the job right the first time? Dycus Heating & Air Conditioning has served Stanislaus County since 2001, and our certified team is ready for your call. Reach us at (209) 544-8072 or book online, and let's get your home comfortable again.