Question 1

Why is my AC running but not cooling the house?

Accepted Answer

The most common causes are low refrigerant (from a leak), a dirty or frozen evaporator coil, a failing compressor, a clogged condenser coil, or a faulty capacitor. A technician can diagnose the exact issue quickly.

Question 2

Can a dirty filter cause my AC not to cool?

Accepted Answer

Yes. A severely clogged air filter restricts airflow over the evaporator coil, which can cause the coil to freeze and stop cooling. Check and replace your filter first — it may resolve the issue.

Question 3

Should I turn my AC off if it's not cooling?

Accepted Answer

If you suspect a frozen coil (you may see ice forming on the refrigerant lines), turn the system to 'fan only' to thaw it. Then call us for a diagnosis — the underlying cause needs to be addressed.

Question 4

Why is my AC running but not cooling my house?

Accepted Answer

The most common causes are a dirty air filter restricting airflow, low refrigerant from a leak, a dirty condenser coil outside, or a failed compressor. Start by checking your filter — if it's clogged, swap it out and give the system 30 minutes to recover. If it's still not cooling, you likely need a professional diagnosis to check refrigerant levels and electrical components.

Question 5

Why is my AC blowing warm air?

Accepted Answer

Warm air from your vents usually points to low refrigerant, a failed compressor, a tripped breaker to the outdoor unit, or a thermostat set incorrectly. Check that your thermostat is set to 'cool' (not 'heat' or 'fan only') and that the outdoor unit is running. If the outdoor unit isn't running or the air stays warm, call us — refrigerant leaks and compressor failures require professional repair.

Question 6

Why is my AC blowing hot air suddenly?

Accepted Answer

A sudden switch to hot air often means your outdoor unit lost power — check the breaker and the disconnect box next to the unit. It can also indicate a capacitor failure, which prevents the compressor from starting. In heat pump systems, a stuck reversing valve can cause the system to blow hot air in cooling mode. Any of these require same-day service to avoid compressor damage.

Question 7

My AC is cooling but not enough — rooms are still warm. Why?

Accepted Answer

Insufficient cooling is usually caused by an undersized system, duct leaks losing conditioned air to the attic or crawlspace, a dirty evaporator coil, or low refrigerant. In Asheville's humid summers, a system that's low on charge will lose both cooling capacity and dehumidification ability. We can perform a full system evaluation to identify where the problem lies.

Question 8

Why does my AC cool some rooms but not others?

Accepted Answer

Uneven cooling is almost always a ductwork problem — either leaky ducts, improperly sized ducts, or dampers that need balancing. It can also be caused by a blower motor running at the wrong speed or an undersized system struggling on the hottest days. We check airflow at every register and inspect the duct system to find the root cause.

Question 9

Why is my AC unit freezing up?

Accepted Answer

An AC freezes when something disrupts the heat exchange process — most commonly a dirty air filter, low refrigerant, or a blower motor that isn't pushing enough air across the evaporator coil. The coil temperature drops below 32°F and moisture in the air freezes on it. Turn the system off, let it thaw completely (this can take several hours), replace your filter, and restart. If it freezes again, you likely have a refrigerant leak that needs professional repair.

Question 10

Why does my AC run all day and never shut off?

Accepted Answer

On extremely hot days (above 95°F), even a properly working system may run continuously and that's normal. But if your AC runs nonstop on moderate days, it usually means the system is undersized, refrigerant is low, the condenser coil is dirty and can't reject heat, or your home has significant air leaks or poor insulation. We can measure the system's capacity and compare it to your home's cooling load to determine the issue.

Question 11

Why is my AC blowing weak airflow from the vents?

Accepted Answer

Low airflow is most commonly caused by a dirty air filter, but it can also result from a failing blower motor, a disconnected or collapsed duct, frozen evaporator coil, or excessive duct leakage. With Asheville's older homes, we frequently find flex duct that has separated at connections or been crushed in the crawlspace. A blower door test and duct inspection can identify exactly where airflow is being lost.

Question 12

How do I know if my AC has a refrigerant leak?

Accepted Answer

Common signs include the system cooling poorly, ice forming on the refrigerant lines or evaporator coil, a hissing sound near the indoor or outdoor unit, and higher-than-normal electric bills. Your AC should never need refrigerant 'topped off' — it's a sealed system. If a technician says you're low on refrigerant, you have a leak that needs to be found and repaired, not just recharged.

Question 13

Can I just add refrigerant to my AC, or does the leak need to be fixed?

Accepted Answer

Simply adding refrigerant without fixing the leak is like putting air in a flat tire without patching the hole — it's a temporary and increasingly expensive fix. EPA regulations require technicians to locate and repair refrigerant leaks. We use electronic leak detectors and nitrogen pressure testing to find leaks accurately, then make a permanent repair before recharging the system.

Question 14

Why does my AC struggle more on humid days in Asheville?

Accepted Answer

Your AC has to remove moisture from the air before it can effectively cool it, and Asheville's mountain humidity creates a heavy moisture load. A system that's low on refrigerant, has a dirty evaporator coil, or is oversized will struggle especially hard on humid days because it can't properly dehumidify. If your home feels clammy even when the AC is running, call us for a system evaluation.

Question 15

How do I know if my ductwork needs to be replaced?

Accepted Answer

Signs of failing ductwork include uneven temperatures between rooms, excessive dust in your home, visible tears or disconnections in accessible ducts, and energy bills that seem too high for your system size. Flex duct in WNC crawlspaces and attics degrades over 15-20 years from moisture, UV exposure, and pests. We can perform a duct leakage test to measure exactly how much air you're losing.

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