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Guides from A&S Cooling Mechanical Contractors

Straight answers to the questions we hear most, written for our own customers.

August 30, 2026 · 2 min read

Commercial Rooftop Unit Maintenance: What a Contract Actually Covers

A rooftop unit failing mid-shift is rarely a surprise to the technician who's been skipping the same three checks for a year. Here's what a real PM visit covers.

August 30, 2026 · 3 min read

Oil-to-Gas Conversion: What Actually Happens During the Switch

An oil-to-gas conversion touches more of the house than most homeowners expect. Here's what the process actually involves, start to finish.

August 30, 2026 · 3 min read

Why Your AC Still Fails With a Clean-Looking Filter

A filter that looks clean to the eye can still be restricting enough airflow to run a compressor into failure. Here's what's actually happening inside the duct.