A system running but not cooling almost always comes down to charge, airflow, or a failing component — we test all three.
A tech who explains superheat and subcooling readings instead of just saying 'it's low on freon'.
A system that's technically running but not actually cooling the house is one of the most misdiagnosed hvac complaints there is, which is exactly why ac repair calls in Upper Marlboro, MD get treated with urgency, not a next-available-Tuesday slot.

AAA Pro HVAC built its AC repair process around one idea: diagnose first, quote honestly, fix it right.
Every truck across Upper Marlboro, MD 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.
Trucks stocked and staged across Upper Marlboro, MD mean shorter windows than a call-center dispatch model.
The number on your quote is the number on your invoice.
Manifold gauges, digital thermometers, and airflow meters confirm the actual fault, not a guess.
Every job starts with a real diagnosis, not a guess — here's the full scope of what our AC repair technicians handle across Upper Marlboro, MD.
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 Upper Marlboro, MD.
A condenser fan that's stalled or running slow lets head pressure spike, which can trip the compressor's high-pressure safety. This is one of the most requested AC repair calls we get across Upper Marlboro, MD.
A dirty or frosted evaporator coil restricts airflow and drops cooling capacity fast. Techs handling evaporator coil cleaning & repair carry the specific parts and tools this job calls for, not a generic kit.
Hard-starting, humming-but-not-spinning, or tripped breaker symptoms get tested with a start capacitor check before any compressor is condemned. This is one of the most requested AC repair calls we get across Upper Marlboro, MD.
A miscalibrated or miswired thermostat can mimic a full system failure. This is one of the most requested AC repair calls we get across Upper Marlboro, MD.
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 Upper Marlboro, MD.

Dispatch confirms your Upper Marlboro address and gives a realistic arrival window.
We text when the tech is en route so you're not watching the driveway.
Superheat, subcounting, and airflow readings get taken before any refrigerant is added.
Workmanship is backed in writing on your invoice.

House was sitting at 84 degrees and the vents were blowing lukewarm air.
Outdoor unit had ice forming on the copper line which I'd never seen before.
They caught it before the compressor overheated and swapped the fan motor same visit.
Their tech knew it on sight and had a replacement part on the truck.

A full diagnostic checks all three before we touch the refrigerant charge.
Ice almost always means something is restricting airflow or refrigerant flow, and running it iced up can damage the compressor.
Every system has a manufacturer-specified charge amount — we don't top off blind, we charge to spec using superheat/subcooling readings.
We carry recovery equipment rated for legacy refrigerants.
Mini-splits have their own fault-code language, and our techs are trained on the major brands.
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 Upper Marlboro or one of the surrounding communities, dispatch routes the closest available technician.
☎ Call +1-844-611-2875 for Upper Marlboro Service