Clear, technical answers to common air conditioning and heating questions — written for homeowners in Tomball, Cypress, and Greater Houston and reviewed by founder Allen Swindell (15+ years HVAC trade experience).
Technical Reviewer: Allen Swindell, Founder & Lead HVAC Technician
15+ Years HVAC Trade Experience · Texas TDLR License TACLA133609C · About the Owner
CoolingAn air conditioner that runs but does not cool is usually suffering from restricted airflow (a dirty filter or iced-over coil), a failed outdoor component such as a capacitor or fan motor, or low refrigerant caused by a leak. A few simple checks can rule out the easy causes, but anything involving refrigerant or electrical parts needs a licensed technician.
CostsMost AC repairs in the Houston area fall somewhere between a couple hundred dollars for a simple electrical part and several thousand for a major component like a compressor or evaporator coil. The final number depends on the part, the labor, refrigerant, access and the time of day you call, which is why a clear, flat-rate quote matters.
Buying GuideRepair is usually the better choice when the system is under about 10 years old, the problem is a single failed part, and the repair costs a modest fraction of a new system. Replacement makes more sense when the unit is 12 to 15 years old or older, needs a major component like a compressor or coil, uses R-22 refrigerant, or keeps breaking down.
MaintenanceHouston homeowners should check the air filter monthly during cooling season, keep the outdoor unit clear, test the condensate drain, and book a professional tune-up before cooling season and again before the short heating season. A few safe habits plus a technician's visit can prevent most mid-summer breakdowns.
CoolingWater around your indoor unit is most often caused by a clogged condensate drain line, but it can also come from a frozen evaporator coil that has melted, a cracked or rusted drain pan, or poor installation. Turn the system off to limit damage, check the filter and drain access safely, and call a licensed technician if the water returns.
CoolingAn evaporator coil freezes when its surface drops below 32°F and moisture in the air turns to ice. The most common causes are restricted airflow from a dirty filter, dirty coil or failed blower, and low refrigerant from a leak. If you see ice, turn the AC off and let it thaw before calling a technician.
MaintenanceMost 1-inch filters should be checked monthly and replaced every one to three months, while thicker 4 to 5 inch media filters often last six to twelve months. In Houston, where AC runs most of the year, homes with pets, allergies or dust may need a change more often.
CoolingUneven temperatures usually come from airflow problems such as leaky, undersized or crushed ducts, closed or blocked vents, too few returns, or insulation and sun exposure that load certain rooms more than others. Some fixes are simple, but ductwork and system sizing issues need a professional evaluation.
HeatingA heat pump uses refrigerant to move heat from one place to another instead of generating it. In summer it pulls heat out of your home and releases it outdoors like an air conditioner, and in winter a reversing valve flips the process so it pulls heat from outdoor air into your home.
Buying GuideSEER2 is the updated efficiency rating that replaced SEER in 2023. It measures the same seasonal cooling efficiency but tests equipment under higher airflow resistance that better reflects real ducts, so the same unit scores a bit lower on SEER2 than it did on SEER.
MaintenanceA professional HVAC tune-up is a systematic inspection and cleaning of your equipment, including electrical testing, coil and drain checks, airflow measurements and refrigerant performance checks. Its goal is to catch worn parts and small problems before they cause a breakdown.
Buying GuideThe right HVAC system is correctly sized for your home through a load calculation, matched to your ducts and climate, and installed properly. Efficiency, equipment type and features matter, but sizing and installation quality usually have the biggest effect on comfort and cost.
If safe homeowner checks do not solve the issue, we provide flat-rate diagnostics and upfront repair pricing across Tomball, Cypress, Houston, Katy, Spring, Magnolia, The Woodlands, and Sugar Land.
