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Summer AC Problems: Common Issues and How to Fix Them

Hot summer days in Burbank can quickly go from uncomfortable to unbearable if your air conditioning isn’t working properly. If your system starts acting up, it’s usually one of a few common issues that pop up more frequently during the hotter months.

Refrigerant Leaks

Low refrigerant is one of the most common causes of warm air blowing from the vents. If the refrigerant level drops, your AC can’t cool your home effectively. This usually happens due to a leak somewhere in the system. Topping off the refrigerant won’t fix the problem long-term — the source of the leak needs to be found and sealed by an AC repair expert before recharging the system.

Dirty Air Filters

A clogged air filter restricts airflow, which puts extra strain on the system and reduces its cooling power. It can also cause the evaporator coil to freeze, leading to poor performance or complete system shutdown. Replacing your filters regularly helps keep air moving freely and your system running efficiently.

Frozen Evaporator Coils

Frozen coils can be caused by poor airflow (often from a dirty filter) or low refrigerant. When the coils freeze, your system can’t absorb heat, which prevents it from cooling your home. If this happens, turning off the system and letting the coils thaw is the first step. But it’s important to figure out why the coils froze in the first place.

Faulty Capacitors

Capacitors help power the motors that keep your AC running. In the summer heat, these components are under more stress and can burn out. If you hear a humming noise but the fan or compressor doesn’t start, a faulty capacitor might be the culprit.

Thermostat Issues

Sometimes the issue isn’t with the AC at all — it’s the thermostat. Dead batteries, bad wiring, or old, outdated models can prevent your system from getting the right instructions. Make sure the thermostat is set correctly and functioning as it should.

Schedule AC Service in Burbank, CA

If your AC is giving you trouble this summer, don’t wait for it to get worse. At Certified Service, we diagnose and repair all types of cooling issues to help keep your home comfortable during the hottest days. Contact our cooling services technicians in Burbank today!