Phoenix summers aren’t just hot — they’re brutal. When the outdoor temperature soars above 105°F and your AC is running but not cooling, the discomfort sets in fast. This is one of the most common HVAC problems homeowners search for, and the causes range from simple fixes to serious system failures.

In this guide, we’ll break down:

• The top reasons your AC might fail to cool

• DIY checks you can safely do

• When to call a licensed HVAC professional

• Cost ranges for common repairs in Phoenix

By the end, you’ll know whether it’s a quick fix or a “call Aguilar A/C & Heating now” situation.

Common Reasons Your AC Isn’t Cooling