HVAC Repair San Antonio TX | Call Semper Cool A/C Heating

An improperly sized unit is a common issue here. An oversized system will short-cycle, turning on and off too frequently, which increases wear, raises humidity, and drives up energy bills. An undersized system will run constantly, struggling to keep up during our hottest days. Our precise installation process ensures your new system is perfectly matched to your home's layout and insulation, providing efficient, reliable comfort.

First, turn the system off at the thermostat to let the ice melt. A frozen coil is often caused by restricted airflow (from a dirty filter or blocked vents) or low refrigerant. Continuing to run it can damage the compressor. Our repair technicians will diagnose the root cause—whether it's a leak, a faulty blower, or another issue—and fix it to prevent recurring freeze-ups and protect your system.

Consider replacement if your system is over 10-15 years old, requires frequent repairs, or your energy bills are climbing steadily. For older units struggling with our heat, a modern, correctly sized system is a wise investment. We'll provide a honest assessment: if a repair like fixing a frozen coil can extend its life cost-effectively, we'll recommend that. If replacement offers better long-term value and comfort, we'll explain your options.