A malfunctioning air conditioner can be a nightmare during hot weather. Start by checking the thermostat settings and ensuring the unit is receiving power. If the AC isn’t cooling, the issue may be a clogged filter or a refrigerant leak. Cleaning the filter can improve airflow and performance, while refrigerant issues should be handled by professionals. This comprehensive guide covers common air conditioning problems and offers troubleshooting tips to help you get your unit running smoothly again.