Furnace Repair & Servicing in Castroville, Texas
When winter approaches in Castroville, Texas, having a reliable furnace is important for keeping your home warm. Diamondback AC provides professional furnace repair and servicing to make sure your system operates the way it should. Whether your furnace needs a quick repair or routine maintenance, we’ll help keep your home comfortable and your heating system running.

Furnace Repair and Maintenance Services for Castroville Homes
In Castroville, a dependable furnace is necessary for the colder months. If your furnace is malfunctioning, making strange noises, or not heating right, our team at Diamondback AC can locate and fix the issue fast. We also offer routine maintenance to help prevent breakdowns, extend the life of your furnace, and keep it running. Let us handle all your furnace repair and servicing needs, so you can stay warm without worry.
Common Furnace Problems We Fix in Castroville
Pilot Light Issues
If your furnace’s pilot light keeps going out, it could be due to a faulty thermocouple or gas line issue. We’ll fix it to get your furnace back in working order.
Inconsistent Heating
If some rooms in your home are warmer than others, there may be an airflow issue or thermostat malfunction. We’ll inspect and fix the problem to restore even heating.
Strange Noises
Unusual noises like banging or rattling can signal a mechanical issue. We’ll diagnose and repair the cause to prevent further damage.

Keep Your Furnace in Good Condition with Routine Maintenance
Regular furnace maintenance is useful to avoid unexpected breakdowns and know your system runs well in Castroville’s cold weather. Our maintenance services include cleaning filters, inspecting heat exchangers, and checking for potential issues. With routine servicing, your furnace will work better and help to lower your energy costs.
Signs You Need Furnace Repair or Servicing in Castroville
Air coming from vents feels much weaker lately.
Furnace cycling on and off too frequently now.
Inconsistent heating or cold spots in your home.
It’s been over a year since your last furnace service.
Rising energy bills without increased usage or activity noticed.
Strange noises, such as banging or squeaking, occur often.
Trusted by the Adkins Community
PWT2025-08-14Trustindex verifies that the original source of the review is Google. Diamond Back is a great company with great staff, whether in the office or in the field. Service is prompt, friendly, and highly professional. They even set us up with a complimentary portable A/C unit so that we at least had one comfortable room while they were waiting for our parts to arrive. Can't recommend them highly enough! J Colt2025-08-11Trustindex verifies that the original source of the review is Google. Used Diamondback AC again for hole HVAC services and they did an awesome job! Thanks THOMAS HIME2025-07-31Trustindex verifies that the original source of the review is Google. Diamondback AC was on the job within 4 hours of my call. In this Texas heat every minute counts. They diagnosed the issue and made the repairs very quickly. I was very impressed with their work and their pricing. Wouldn't hesitate to use them again and to refer them to friends and family. Thanks again! Candace Hillard2025-07-31Trustindex verifies that the original source of the review is Google. Jose was thorough and on time and worked meticulously to ensure system was functioning properly. Zachary Aybar2025-07-22Trustindex verifies that the original source of the review is Google. Excellent service! Appreciate your help and professionalism Jesus López2025-07-22Trustindex verifies that the original source of the review is Google. Diamondback A/C was able to take care of our problem. The tech came out and cleared the problem on a weekend. 100% recommend these guys Mark Nelson2025-07-14Trustindex verifies that the original source of the review is Google. Jose was great. He took the time to explain in terms I could understand what he was going to do and at the end what he did. Very knowledgeable and professional. Roy White2025-07-09Trustindex verifies that the original source of the review is Google. Always available to come out quickly. Never trying to oversell non issues and always professional. Will continue to use Diamondback! k g2025-07-01Trustindex verifies that the original source of the review is Google. Diamondback was recommended to us from a friend, and they're amazing. Very polite, communicated any issues, and fixed our AC unit quickly. Marye Lou Landrum2025-06-30Trustindex verifies that the original source of the review is Google. Excellent Company. Have used them several years. Very professional and excellent work ethics.
Stay Warm with Reliable Furnace Repair in Castroville
Don’t let a faulty furnace be the reason you are shivering cold this winter. Diamondback AC offers dependable furnace repair and maintenance services in Castroville, Texas, to keep your home warm and comfortable. Contact us today to schedule your service.
| Service Areas
Serving Adkins, Texas and Surrounding Areas
Adkins, Texas, is a small community located just southeast of San Antonio. Known for its rural charm and close proximity to larger cities, Adkins offers residents a quiet lifestyle with easy access to the amenities of San Antonio. The area is home to several local attractions that highlight its rich history and natural beauty.
Calaveras Lake
Calaveras Lake is a favorite spot in Adkins, Texas, where residents enjoy fishing, boating, and picnicking. This reservoir also plays an important role in providing power to the region..
Adkins Community Center
The Adkins Community Center is a key location for local events and gatherings. It’s where residents come together for meetings, celebrations, and community activities.
St. Hedwig Memorial Park
St. Hedwig Memorial Park, located nearby in St. Hedwig, offers a quiet place for relaxation. The park is an important part of the area’s history, providing a beautiful setting to appreciate local heritage.
Diamondback AC, Heating & Refrigeration
Castroville’s leading HVAC service provider, committed to delivering exceptional service and ensuring customer satisfaction.