Why Does My AC Struggle to Start — and Why Do the Lights Dim When It Kicks On?

Current as of October 27, 2026.

The Short Answer

What the Homeowner Is Seeing

Lights Flickering — or Half the House Without Power?

When the pattern points to the house supply, not the air conditioner.

What Is Actually Happening

What a Professional Checks

Why Is My House So Humid?

When the system starts cleanly but leaves the house clammy.

The Safety, Code, and Repair Boundary

What to Ask the Contractor

Sources

Learn from a Pro

More homeowner answers from ABest Pros.