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Our HVAC Services

Cooling HVAC Service in Katy, TX

Cooling

At 4C A/C & Heating, we make your comfort our top priority. Don’t leave AC repair to a contractor with subpar reviews…


AC Repair

Heating Repair in Katy, TX

Heating

At 4C A/C & Heating LLC, we’re Katy’s furnace experts: We offer repair, servicing, and replacement. Our team can repair all…


Furnace Repair

Air Filter Replacement in Katy, TX

Air Filter Replacement

The proper air filter replacement can ensure your furnace or AC unit continues to function properly… 


Air Filter Replacement

Thank You for Voting Us Best of Katy!

Best of Katy 2025
Best of Katy 2025 1st Place
HVAC Company in Katy, TX

About 4C A/C and Heating: Leading HVAC Company in Katy

Chris and Christina Rannigan founded 4C A/C & Heating in July 2012. The family owned HVAC company was named after the Rannigan family, Chris, Christina, Cailyn, and Cambrie. Chris has been in the industry since 2000, beginning his career as an installer and later working as a service technician before starting the company. He understood how important it is for homeowners to have an honest and trustworthy technician in their home and set out to build a company that homeowners could trust, built on the values his family believes in.

We take pride in serving our community, and our name and brand mean a lot to us. Christina’s background is in Human Resources and Health & Safety, and she ensures that day-to-day operations are run legally and safely. She takes great pride in every single person hired on the team and makes sure each individual’s values align with the company’s. Cailyn works for 4C, managing our social media pages and planning community events. When Cambrie isn’t on the softball field, she enjoys running service calls with Chris and climbing in attics.

Reliable Licensed HVAC Experts in Katy, TX

4C A/C & Heating provides licensed HVAC repair, heating, and cooling services in Katy, TX, and the surrounding areas. With years of experience, our skilled technicians deliver reliable solutions for air conditioning, heating, and indoor air quality to keep your home comfortable year-round.

No matter what your individual needs are, we can find a solution that works for you. Our team has carried out installations, repairs, and maintenance for all makes and models of HVAC systems, so we can handle anything when it comes to HVAC.

Top-Rated HVAC Services

At 4C A/C & Heating, our team has years of experience and can make sure you’re getting the highest quality service every time. Our many services include:

Our Special Offer


10% Off Any Indoor Air Quality Service


$10 Off Any Furnace Tune Up


$50 Off Repairs for New Customers

Our Service Areas

We’re proud to be a family-owned and operated business here in Katy, TX, serving surrounding areas including:

Just give us a call today to see what we can do for you!

What Your Neighbors Say About Us

Five Star Reviews

Amazing service! Chris and his team are absolutely amazing. They are prompt, thorough, kind, and just all around awesome. I have had many others come and look at our AC issues, and honestly I will never go anywhere else again. Their pricing is great and the work they do is even better…
Brittany S.Satisfied Customer

Five Star Reviews

Highly recommend. Our heat went out during a really cold day and Texans cannot do cold weather! Agent who answered my call was very helpful, transparent, and was able to get us a same day appointment. We had a technician here within 45 minutes of my call. Technician was done…
Bianca P.Satisfied Customer

Five Star Reviews

Saw the truck across the street at a neighbors. Called and Jeremy was awesome. He came assessed the problem, (compresser issue) had the part we needed in his truck and explained that he was able to get our air back in running in no time. Very awesome customer service…
Kimika T.Satisfied Customer

Five Star Reviews

Chris came out to inspect and quite repairs on my HVAC system the day after I called. He was on time and professional. He was able to come back later in the day to handle the actual repairs and had me up and running properly in no time. Highly recommend this company…
Jacob C.Satisfied Customer

Five Star Reviews

I have used this company in the past, they did great work and were extremely professional! I called them a second time for an unrelated issue, the technician informed me that he could not repair that coil because it was out of stock and wouldn’t have one available for at least 6 months!…
Tony G.Satisfied Customer

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Making HVAC Repair Service Easy for You

We want to make our services as accessible as possible for our valued customers. Our maintenance plans make keeping track of HVAC maintenance easy and let you save on tune-ups. 

We also provide financing opportunities to help you invest in your home’s HVAC systems without breaking the bank.


Apply for Financing Today

HVAC maintenance Katy TX

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