Licensed & Experienced HVAC Technicians
Complete Heating & Cooling Services for Central Texas
From routine maintenance to emergency repairs, Diamond Double J handles every aspect of your home or business comfort system — with honest pricing and 30+ years of experience.
Stay cool all summer long
AC Services
Texas summers are no joke. Whether you need a brand-new system installed or your existing unit repaired, our licensed technicians get the job done right the first time.
- AC system installation & replacement
- AC repair & diagnostics
- Refrigerant recharge & leak detection
- Thermostat installation & calibration
- Ductwork inspection & sealing
- All major brands serviced
Reliable warmth when temperatures drop
Heating Services
When cold weather hits Central Texas, you need a heating system you can count on. We install and repair heat pumps, furnaces, and all types of heating equipment.
- Heat pump installation & repair
- Furnace & heater repair
- Heating system replacement
- Carbon monoxide safety checks
- Blower motor & igniter repair
- Gas & electric systems
Keeping your business running smoothly
Commercial Refrigeration & Ventilation
We service restaurants, grocery stores, and commercial facilities throughout the region. Our team handles refrigeration system installation, repair, and ventilation services.
- Commercial refrigeration installation
- Walk-in cooler & freezer repair
- Refrigeration system diagnostics
- Ventilation system installation
- Exhaust & supply fan service
- Preventive maintenance contracts
24/7 — nights, weekends & holidays
Emergency Repair
HVAC emergencies don't wait for business hours. We're available around the clock to respond to breakdowns, keeping your family safe and comfortable no matter when disaster strikes.
- 24/7 emergency response
- Same-day service available
- AC & heating system failures
- Refrigerant leaks
- Frozen coils & lines
- No after-hours price gouging
Prevent problems before they start
Seasonal HVAC Maintenance
Regular maintenance extends the life of your system, improves efficiency, and catches small issues before they become expensive repairs. We offer spring and winter tune-up packages.
- Spring AC tune-up & inspection
- Winter heating system check
- Filter replacement & cleaning
- Coil cleaning & refrigerant check
- Electrical connection inspection
- Full system performance report
Not Sure What You Need?
Call or text us and we'll help diagnose the problem — no pressure, no obligation.