Xcell Williams

Heating contractor
4.8(143 reviews)
3901 Shirley Ave, St. Louis, MO 63121
Xcell Williams

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About Xcell Williams

Xcell Williams Heating & Cooling has earned a 4.8-star rating across 143 customer reviews while operating 24/7 to serve the St. Louis metro area, including St. Peters, St. Charles, and Maryland Heights. The company handles both residential and commercial heating and cooling projects, offering installation, maintenance, and emergency repair services. Their 24-hour availability ensures St. Louis homeowners never face a night without functioning HVAC equipment, a critical consideration given the region\u2019s dramatic seasonal temperature swings.

What distinguishes Xcell Williams from neighboring contractors is their commitment to rapid response and transparent diagnostics. The company operates under two phone numbers serving St. Louis and Warrenton, with both lines handling emergency calls around the clock. Reviewers consistently note that technicians arrive the same day problems are reported, and the team provides detailed explanations of issues rather than upselling unnecessary parts. Their service fleet maintains common replacement components, allowing on-site resolution rather than delayed follow-up visits.

Customer testimonials reveal dedicated technicians who become trusted household names. Lauren W described how, facing a wedding in five days with family arriving, the owner Casey personally installed a new AC unit within 48 hours to save her celebration. Marian Reed credited Eric with arriving the same morning she was referred by her home warranty service, restoring cool air within hours after two weeks without AC. These scenarios illustrate why the company maintains around-the-clock scheduling for St. Louis families who cannot wait for business hours when systems fail during extreme heat or cold.

What Customers Say

143 reviews averaging 4.8 stars reveal consistent praise for same-day response times and diagnostic thoroughness. Customers repeatedly mention Chris, Erik, and owner Casey by name, with specific scenarios including emergency heat wave repairs and wedding-weekend installations. The only criticism relates to pricing, while positive reviews cite problem-solving skill and respect for customer property.

4.8 · 143 reviews
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Working Hours

SundayOpen 24 hours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayTodayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours

Services

AC Installation & Replacement

New air conditioning installation for homes and businesses using modern, energy-efficient systems.

AC Repair & Maintenance

Diagnostics, refrigerant service, leak repair, and seasonal maintenance to keep cooling systems running.

Furnace Installation & Repair

New furnace setup and winter heating system repairs for St. Louis cold seasons.

HVAC System Installation

Complete HVAC system installation integrating heating, cooling, and ventilation.

Annual HVAC Maintenance

Year-round maintenance including checkups, cleaning, and component replacement.

Gas Leak Detection

Professional detection and repair of natural gas leaks in heating equipment.

Boiler Services

Installation and repair of residential and commercial boiler heating systems.

Air Cleaners & IAQ

Indoor air quality improvements through air cleaning and filtration systems.

Frequently Asked Questions