A system running but not cooling almost always comes down to charge, airflow, or a failing component — we test all three.
Straightforward flat-rate pricing, quoted after diagnosis.
If you're dealing with warm air blowing from the vents, ice forming on the copper line, or a condenser fan that's stopped spinning outside, you already know a system that's technically running but not actually cooling the house is one of the most misdiagnosed HVAC complaints there is.

Most AC repair problems give some warning before they turn into warm air blowing from the vents, ice forming on the copper line, or a condenser fan that's stopped spinning outside — catching it early usually means a shorter, cheaper fix.
AAA Pro HVAC built its AC repair process around one idea: diagnose first, quote honestly, fix it right.
Every truck across Markham, IL carries the tools and common parts specific to AC repair, so most calls finish in a single visit.

Every tech carries EPA Section 608 certification, required for legally handling refrigerant.
We route by real-time technician location, not a fixed territory list.
Diagnostic first, quote second, work third — that order never changes.
We check superheat and subcooling against manufacturer spec before touching the refrigerant charge.
From the first symptom to the final fix, these are the specific AC repair services our Markham-area crews are equipped for.
Low charge is a symptom, not a diagnosis — we find the leak with electronic detection and UV dye before recharging. This is one of the most requested AC repair calls we get across Markham, IL.
We test motor amperage against rated draw before replacing. This is one of the most requested AC repair calls we get across Markham, IL.
We check for coil frost, which usually points to airflow or charge issues upstream. This is one of the most requested AC repair calls we get across Markham, IL.
A failed compressor is often the last domino, not the first. This is one of the most requested AC repair calls we get across Markham, IL.
We verify the low-voltage circuit before assuming the outdoor unit is at fault. This is one of the most requested AC repair calls we get across Markham, IL.
Ductless systems fail differently than central air — we service indoor head units, line sets, and outdoor condensers. This is one of the most requested AC repair calls we get across Markham, IL.

Tell us whether the air is warm, the unit is icing, or it's not running at all — that detail changes what parts ride along.
Techs arrive with manifold gauges and common capacitor/contactor stock already loaded.
Superheat, subcounting, and airflow readings get taken before any refrigerant is added.
Workmanship is backed in writing on your invoice.

Turned out to be a slow leak at the schrader valve — they found it with dye, fixed it, and recharged properly.
Outdoor unit had ice forming on the copper line which I'd never seen before.
Condenser fan had completely stopped and the compressor was still trying to run.
Mini-split in the sunroom was throwing a code I couldn't find online.

Usually low refrigerant charge from an undetected leak, a dirty evaporator coil, or restricted airflow from a clogged filter.
Ice almost always means something is restricting airflow or refrigerant flow, and running it iced up can damage the compressor.
Adding refrigerant without finding the leak just means another service call later.
We carry recovery equipment rated for legacy refrigerants.
Yes — indoor head units, outdoor condensers, and line sets all fall under our service scope.
Call volume rises with the heat, so arrival windows can extend during heat waves — dispatch gives you a live estimate when you call.

Whether you're in the heart of Markham or one of the surrounding communities, dispatch routes the closest available technician.
☎ Call +1-866-805-8548 for Markham Service