About Walker HVAC

Walker Air Conditioning & Heating has been the go‑to HVAC partner for Costa Mesa residents and businesses since 2005. Founded by lifelong Angeleno Mark Walker, our company grew from a one‑truck service to a fleet of ten fully equipped vans, serving over 3,000 customers annually. We pride ourselves on transparent communication, flat‑rate pricing, and unwavering reliability. Our technicians hold NATE and EPA certifications, undergo continuous training, and arrive in uniform with fully stocked trucks to tackle any heating or cooling challenge—fast.

We understand Southern California’s climate extremes: scorching summers and unexpected cool snaps. That’s why we offer tailored maintenance plans, energy‑efficient system upgrades, and emergency response 24 hours a day. From new construction projects to legacy system upgrades in older homes, our expertise spans split systems, package units, ductless mini‑splits, and commercial rooftop equipment. At Walker HVAC, our mission is simple: keep you comfortable, healthy, and informed every step of the way.

Why Choose Us

Rapid Emergency Response

Our local dispatch guarantees arrival within 90 minutes of your call—any day, any time. We minimize downtime and restore comfort quickly.

Flat‑Rate, Honest Pricing

Get a clear, written estimate before work begins. No hourly guesswork, no hidden fees—just fair pricing for quality workmanship.

Certified & Insured Team

All our technicians are fully licensed, insured, and background‑checked, with ongoing training in the latest HVAC technologies.

Satisfaction Guaranteed

We stand behind our work with a 100% satisfaction guarantee. If you’re not happy, we’ll return promptly to make it right.

Our Services

Emergency HVAC Repair

When your system fails at the worst possible moment—be it a summer heat wave or winter chill—call Walker HVAC’s emergency hotline. Our dispatcher will send out a local technician who arrives fully prepared with diagnostic tools, replacement parts, and protective gear. Typical repairs include compressor replacements, refrigerant leak sealing, ignition control fixes, and electrical component swaps. We adhere to manufacturer specifications and local codes, ensuring your system operates safely and efficiently after each repair.

AC Installation & Replacement

Considering a new cooling system? Walker HVAC performs detailed load calculations to recommend units with optimal SEER ratings and capacity for your space. Our installation process includes precise refrigerant charging, airflow balancing, duct sealing, and thermostat calibration. We partner with top brands—Carrier, Trane, Lennox—to provide durable, energy‑efficient solutions that lower utility bills and improve indoor comfort.

Heating & Furnace Services

From gas furnace tune‑ups to heat pump installations, our technicians ensure reliable warmth throughout cooler months. We inspect heat exchangers, clean burners, test safety controls, and lubricate moving parts. For heat pumps, we verify refrigerant levels, defrost cycles, and electrical systems. Our preventive maintenance catches issues early, reducing emergency repairs and extending equipment lifespan.

Preventative Maintenance

Enroll in our seasonal maintenance plan and enjoy priority scheduling, discounted repairs, and thorough system inspections. Each visit includes filter replacement, coil cleaning, blower motor service, thermostat check, and a comprehensive safety audit—keeping your system running smoothly year‑round.

Indoor Air Quality Solutions

We assess your home’s ventilation and humidity, then install air purifiers, UV lights, dehumidifiers, and high‑efficiency filters to reduce allergens, bacteria, and odors. Improve respiratory health and maintain ideal humidity levels with customized IAQ packages from Walker HVAC.

Smart Controls & Thermostats

Upgrade to programmable and Wi‑Fi thermostats for enhanced comfort and energy savings. Our experts install and configure smart thermostats that learn your schedule, optimize settings, and provide real‑time energy usage data—right from your smartphone.

What Our Customers Say

"Walker HVAC came out within an hour of my call during a heatwave. The technician was professional, fixed my AC quickly, and explained everything clearly. Best service in Orange County!"

— Sarah M., Costa Mesa

"I switched to Walker’s maintenance plan last year—no more surprise breakdowns, and my energy bills are noticeably lower. Friendly team and honest pricing!"

— David L., Irvine

"We had our aging furnace replaced with a high‑efficiency heat pump. Walker HVAC handled permits, installation, and follow‑up testing seamlessly. Highly recommend!"

— Maria G., Anaheim

Clean or Replace Filters Monthly

Dirty filters reduce airflow, strain your system, and compromise indoor air quality. Check and clean reusable filters every 30 days, or replace disposable filters quarterly to maintain peak efficiency and protect components from dust buildup.

Keep Outdoor Units Clear

Debris, foliage, and dirt can obstruct airflow around your condenser or heat pump. Maintain a 2‑foot clearance, remove leaves and grass clippings, and rinse coils gently with a garden hose to ensure optimal heat exchange.

Schedule Spring & Fall Tune‑Ups

Preventative maintenance before peak seasons catches small issues early and calibrates your system for seasonal demands. Walker HVAC’s tune‑up includes full safety inspections, lubrication, refrigerant checks, and performance optimization.

Walker Air Conditioning & Heating