No Hidden Fees – Transparent Pricing
- Summerwood, Houston, TX
- contact@acrepairservicetx.com
Our technicians identify and repair refrigerant leaks, preventing system damage, boosting performance, and keeping your home cool
We conduct thorough airflow diagnostics to detect blockages, leaks, or inefficiencies, ensuring optimal system performance
If your AC runs longer cycles than it used to, struggles to maintain your set temperature, or your energy bills have increased noticeably without any change in usage habits, a dirty evaporator coil is one of the most common causes in Houston homes and businesses. Houston's combination of high humidity, airborne allergens, pollen, and dust creates a layer of biological and particulate buildup on evaporator coil surfaces faster than in most other cities. Even a thin layer of fouling on the coil surface acts as an insulating barrier that reduces heat transfer efficiency dramatically, forcing your system to run significantly longer to achieve the same cooling output it previously delivered in shorter cycles.
If your AC suddenly stops cooling and you notice ice forming on the copper lines near your indoor air handler or frost visible around the air handler cabinet itself, your evaporator coil has frozen due to restricted airflow, low refrigerant, or a combination of both. A frozen evaporator coil blocks all airflow through the system and produces zero cooling until the ice melts and the underlying cause is corrected. In Houston's heat the loss of cooling while waiting for a frozen coil to thaw is immediately uncomfortable and potentially dangerous for vulnerable household members. Running the system while the coil is frozen causes the liquid refrigerant to migrate back to the compressor and cause catastrophic internal damage.
If your AC gradually loses cooling capacity over days or weeks, requires refrigerant top-ups that only restore cooling temporarily, or your technician has confirmed refrigerant loss without finding an obvious line leak, your evaporator coil is the most likely source of the leak. Evaporator coil leaks in Houston are most commonly caused by formicary corrosion, a chemical reaction between copper coil surfaces, Houston's humidity, and formic acid produced by common household cleaning products and building materials. Formicary corrosion creates pinhole leaks in the coil that are difficult to locate and seal, and a coil with multiple pinhole leaks throughout its surface is typically a candidate for full coil replacement rather than individual leak repair.
If your home or business feels persistently humid and sticky even with the AC running correctly, a fouled or damaged evaporator coil may have lost its ability to condense moisture from the air passing across its surface. The dehumidification function of your AC system depends entirely on the evaporator coil surface being clean, cold, and at the correct refrigerant pressure to cause moisture in the air to condense and drain away. In Houston where indoor humidity above 60 percent creates mold growth conditions within days, a coil that is no longer dehumidifying effectively is not just a comfort problem but a property protection and health issue that demands prompt professional attention.
If you notice a musty or moldy smell from your vents every time your AC runs, mold or mildew has established itself on your evaporator coil surface or in the drain pan beneath it. Houston's humidity creates ideal conditions for mold growth on evaporator coils because the coil surface is consistently cold and wet during operation, providing exactly the moisture and surface area that mold colonies need to establish and spread. Mold on the evaporator coil is not just an odor problem. Every time your system runs it distributes mold spores throughout every room in your home or business through the ductwork, creating an indoor air quality problem that affects your family's or employees' respiratory health every single day the system operates without treatment.
Your technician begins with a complete inspection of your indoor air handler including the evaporator coil surface condition, drain pan and condensate drain line, refrigerant line connections at the coil, coil access panel and cabinet condition, and airflow through the coil. Every symptom your system is displaying including reduced cooling output, frozen coil, high indoor humidity, musty odors, and refrigerant loss is documented before any diagnostic testing begins so the complete picture of your coil's condition is understood before any repair approach is determined.
Your evaporator coil is tested using digital manifold gauges to measure refrigerant pressure on both the suction and liquid lines at the coil, verifying correct refrigerant charge and identifying pressure drops that indicate refrigerant loss from the coil. An electronic leak detector and UV dye inspection are used to identify any refrigerant leak points on the coil surface or at line connections. Airflow across the coil is assessed and coil surface temperature is measured to verify correct heat absorption is occurring across the entire coil face.
Your technician determines the precise cause of your evaporator coil problem whether it is particulate and biological fouling reducing heat transfer efficiency, formicary corrosion creating refrigerant leaks, restricted airflow from a dirty filter or blocked return causing freeze-up, incorrect refrigerant charge affecting coil pressure and temperature, condensate drain blockage causing water backup and mold growth, or physical damage to the coil from previous service or installation. Correct root cause identification determines whether coil cleaning, targeted leak repair, or full coil replacement is the appropriate and most cost-effective solution for your specific situation.
Before any repair work begins you receive a complete written quote covering all cleaning agents, repair materials, refrigerant handling, and labor involved in restoring your evaporator coil to correct operation. If full coil replacement is necessary your technician provides a clear cost comparison between coil replacement and full system replacement so you make the most financially sound decision for your property. There are no hidden costs and no pressure to approve work beyond what your system genuinely requires.
Your technician performs the correct repair based on diagnostic findings. Fouled coils are cleaned using approved no-rinse evaporator coil cleaner applied to the full coil face to dissolve biological buildup, restore heat transfer surface area, and eliminate mold colonies at the source. Condensate drain lines are flushed and cleared. Refrigerant leak points are addressed through targeted brazing repair where the coil structure allows or full coil replacement when corrosion is widespread. All refrigerant work follows EPA Section 608 certified handling procedures including full system recovery, evacuation, and recharge to manufacturer specifications.
After every evaporator coil repair your system is fully tested for correct refrigerant pressure on both suction and liquid lines, verified temperature differential in the 16 to 22 degree Fahrenheit range at supply vents, confirmed airflow in CFM across the coil, and stable system cycling without freeze-up or thermal shutdown. Your technician walks you through filter replacement schedules, UV light installation options that prevent future mold growth on the coil, and condensate drain maintenance that protects your coil investment between professional service visits.
Why Our Services We understand how important a comfortable a cool space is. Avoid disturbing your and your loved ones health and productivity. That’s why we’re here to help you live better, every day.
Licensed and EPA-Certified Technicians: Every technician serving your home holds a valid Texas HVAC license and EPA Section 608 certification. You never get an unlicensed subcontractor working on your system.
Same-Day Service and Extended Hours: You can reach us Monday through Friday from 7am to 10pm, Saturday from 8am to 10pm, and Sunday from 7am to 9pm. We serve all of Houston including Katy, Sugar Land, Pearland, Spring, and Cypress with most technicians arriving within 2 to 4 hours of your call for fast and reliable AC repair service in Houston.
Upfront Written Pricing: You see the full cost before work begins. What you approve is exactly what you pay with no additions after the job is done.
Written Warranty on Every Repair: Your parts and labor are fully covered. If a repair fails within the warranty period, we return and correct it at no charge to you.
Honest Repair vs. Replace Advice: You get a straight cost comparison so you can make the best decision for your home and budget without any pressure or upselling.
The most common signs your evaporator coil needs attention in Houston are your AC running longer cycles without reaching the set temperature, ice forming on the refrigerant lines near the air handler, a musty smell from your vents, high indoor humidity despite the system running, and unexplained increases in your energy bills. A technician inspection with refrigerant pressure testing confirms the coil's condition and the correct repair approach for your specific situation.
Professional evaporator coil cleaning in Houston typically costs between $150 and $400 depending on coil size, access difficulty, and the extent of biological and particulate buildup present. Evaporator coil replacement costs between $800 and $2,500 depending on coil size and system configuration. You receive a complete written quote before any work begins so you know the full cost before approving anything.
In Houston's high humidity and high allergen environment your evaporator coil should be professionally inspected and cleaned every one to two years. Houston's combination of humidity, pollen, and near year-round AC operation accelerates coil fouling significantly faster than in drier or seasonal climates. Annual maintenance visits that include coil inspection catch buildup before it reduces system efficiency and creates mold growth conditions.
Yes. A heavily fouled evaporator coil restricts airflow across the coil surface so severely that the coil temperature drops below freezing and ice begins to form. A frozen evaporator coil produces no cooling and forces liquid refrigerant back toward the compressor, causing internal damage if the system continues to run. If you notice ice on your refrigerant lines turn the system off immediately and call for same-day service.
Evaporator coil cleaning is typically completed same-day. Evaporator coil replacement requires sourcing a correctly matched replacement coil and is usually completed within one to two business days depending on coil availability for your specific system. We are available Monday through Friday from 7am to 10pm, Saturday from 8am to 10pm, and Sunday from 7am to 9pm and will advise you on realistic timing when you call.
The most common cause of evaporator coil leaks in Houston is formicary corrosion, a chemical reaction between the copper coil surface, Houston's persistent humidity, and formic acid generated by household cleaning products, air fresheners, and certain building materials. This corrosion creates pinhole leaks throughout the coil surface that cause gradual refrigerant loss. A coil with widespread formicary corrosion typically requires full replacement rather than individual leak repair.
Yes. Mold on your evaporator coil distributes mold spores through your ductwork and into every room in your home or business every time your system runs. In Houston's climate where mold growth is already a heightened concern due to high humidity, an untreated moldy evaporator coil creates ongoing respiratory health risks for your family or employees. Professional coil cleaning eliminates the mold colony at the source and restores healthy indoor air quality.
If your coil has a single isolated leak and is under 8 years old, targeted repair is usually the most cost-effective approach. A coil with widespread formicary corrosion, multiple leak points, or physical damage throughout the coil structure is typically more economical to replace entirely. We provide a clear written comparison of repair versus replacement costs so you make the decision that is right for your system's age, condition, and your budget.
We serve all of Houston including The Heights, Montrose, Midtown, Bellaire, Memorial, Katy, Sugar Land, Pearland, Spring, and Cypress. If your home or business is anywhere in the greater Houston metro area we can reach you. Call to confirm your address and receive an accurate estimated arrival time from your nearest available technician.
Yes. Every evaporator coil repair and replacement we complete is backed by a written warranty covering both parts and labor. If any repair or replacement we performed fails within the warranty period we return to your property and correct it at no additional cost to you. Ask your technician for the specific warranty terms that apply to your evaporator coil service at the time of the visit.
TestimonialsWe were struggling with unbearable heat, and our old AC just couldn’t keep up. They stepped in and not only fixed the issue but made our home cooler than ever before. Their professionalism and quick service truly made a difference for us. Highly recommend!
Our AC broke down in the middle of a heatwave, and we were panicking. We couldn't sleep, and our family was miserable. They came to the rescue quickly, fixed the problem, and even offered tips to keep our system running smoothly. Now, we can finally sleep soundly again. Thank you
Running a business with a faulty AC system was a nightmare. Customers weren’t comfortable, and our staff was struggling to stay focused in the heat. They installed a new system fast and efficiently, helping us get back to work without skipping a beat. Our business is achieving milestones again, all thanks to their amazing service.
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