My air conditioner runs but doesn't cool the house — why?

Low refrigerant, a dirty or frozen evaporator coil, a clogged outdoor condenser coil, and a weakening compressor top the list. A technician measures refrigerant pressures and coil temperatures to zero in on the specific cause.

Why does my air conditioner keep tripping the breaker?

A breaker that trips over and over signals a significant electrical problem — typically a grounded compressor, a short somewhere in the wiring, or a capacitor pulling excessive current. Stop resetting it and bring in a professional.

How old is too old for an air conditioner?

The typical air conditioner lasts 15–20 years. Once it passes the 12-year mark, efficiency has usually dropped enough that replacement begins to make financial sense, particularly when repair bills are stacking up.

Air Conditioner Not Working — Common Causes & Fixes

Comprehensive breakdown of the most frequent reasons air conditioners fail and the repair involved for each one.

Get a Free Quote (828) 845-1974

NATE-certified20+ years24/7 service

(828) 845-1974

Professional Air Conditioner Not Working — Common Causes & Fixes in Asheville & Western NC

The Most Frequent Reasons Your Air Conditioner Fails

Air conditioner breakdowns tend to cluster into a handful of predictable categories. Electrical faults — tripped breakers, dead fuses, unresponsive thermostats — are behind roughly 30% of service calls. Airflow problems such as clogged filters, obstructed vents, and frozen coils represent about 25%. Refrigerant-related issues account for around 20%, with mechanical component failures like compressors, fan motors, and capacitors making up the balance. Knowing which bucket your issue falls into guides you toward the right next step.

Electrical Faults — Usually the Simplest Fix

When your air conditioner shows absolutely no response, look at the thermostat screen first. A blank display means the batteries need swapping or the breaker feeding it has tripped. Head to the main electrical panel and scan for an HVAC breaker sitting in a middle position — that's a trip. The outdoor unit has its own disconnect box on the exterior wall nearby; confirm it's switched on. These basic electrical checks resolve roughly one out of every five "AC isn't working" calls across the Asheville area.

Refrigerant and Airflow Troubles

A system that operates but fails to cool points toward either a refrigerant leak or severely choked airflow from a dirty filter or iced-over evaporator coil. Frozen coils are particularly prevalent in WNC's humid environment — even a slightly low refrigerant charge combined with heavy moisture in the air triggers rapid ice accumulation. If you spot frost or ice coating the copper refrigerant lines near your indoor unit, shut the system off, switch the fan to "on" to accelerate thawing, and schedule AC repair.

Mechanical Component Failures

Fan motors, compressors, and capacitors all have finite lifespans. An outdoor unit that hums but refuses to start is a classic sign of a blown capacitor — one of the most budget-friendly repairs. A compressor that repeatedly trips the breaker may be suffering from a ground fault, which is a more consequential problem. Quality Mechanical's technicians rely on precision electrical testing to identify exactly which part has failed, ensuring you only pay for what actually needs fixing.