Heating & Cooling › Subcategory

Air Conditioning Problems

AC not cooling, short cycling, freezing up, leaking water, or refusing to start — every central AC failure traces back to airflow, refrigerant, electrical, or drainage. Here's how to read the symptoms and find the source.

📄 5 guides👤 T.A. — Certified Facility Manager & HVAC Systems Specialist

The Complete Home Air Conditioning Guide

How your AC system works, how to diagnose every major failure mode, and how to decide what you can fix versus when to call a technician.

Read the Master Guide →

Air Conditioning Problem Guides

Central AC failures follow predictable patterns. Match your symptom to the right guide below.

🔴 High Priority

Why Your AC Runs But Doesn't Cool

A running AC that produces no cold air has failed in one of four systems: airflow, refrigerant, electrical, or the compressor. Here's how to work through the diagnosis in order.

10 min read→

🔴 No Cooling

Why Your AC Won't Turn On

An AC that doesn't respond at all usually has a power, thermostat, or safety-switch problem — not a failed compressor. Work through this sequence before calling a tech.

8 min read→

⚠ Shut Down First

Why Your AC Is Freezing Up

Ice on your AC coil or lines means restricted airflow, low refrigerant, or a failing blower. Running a frozen system damages the compressor — here's what to do immediately.

8 min read→

⚠ Watch Closely

Why Your AC Is Short Cycling

An AC that turns on and off every few minutes stresses capacitors, contactors, and the compressor with every start — and accelerates failure. Here's what's causing it.

9 min read→

Air Conditioning

Why Your AC Is Leaking Water

Water dripping from your AC unit or air handler is almost always a condensate drain problem — a clogged line, cracked pan, or missing trap. Here's how to find the source.

8 min read→

T.A.

T.A. — Certified Facility Manager & HVAC Systems SpecialistNFPA CFI-1 · CHFM · CLSS-HC · OSHA 30. All air conditioning guidance on this site is written and reviewed by T.A.