AC Running but Not Cooling? Likely Causes & Same-Day Fix

The usual suspects

A dust-loaded filter chokes airflow, so the system runs but barely cools. The #1 cause we find.

Refrigerant never gets "used up" — low means a leak. Weak cooling, sometimes a faint hiss or ice.

Cottonwood fluff and grime stop the outdoor unit from dumping heat, and capacity drops hard on hot days.

The outdoor unit hums or the fan spins while the compressor sits out — air moves, nothing cools.

Skip the guessing.

A tech with gauges finds it in minutes. Most no-cool calls are fixed the same visit, price approved by you first.

60 seconds online · or call (206) 486-6373

1
Thermostat on COOL, set at least 3°F below room temperature.
2
Swap the filter if it’s grey and furry, then give it 30–60 minutes.
3
Rinse the outdoor unit gently with a hose — power off at the disconnect first.
4
Feel the big copper line at the outdoor unit: not cold (or icy) means refrigerant trouble — that’s our job.

Still not working? Then it’s a technician job — and the sooner it’s booked, the sooner the house is comfortable again. Book the visit →

You approve the price first. Upfront quote before a single screw turns.
Same-day service. Book in a minute, hear from a tech within 1 business hour.
500+ jobs done by 4.9★ rated, professional technicians.
Fixed right, guaranteed. If it’s not right, we make it right.

Sudden = usually electrical: a tripped breaker or a failed capacitor. Check the panel; if power’s fine, a capacitor swap is a quick same-day repair.

No — it’s EPA-restricted, and low charge means a leak. Topping up without fixing the leak buys weeks, not a repair.

Book online and a tech reaches out within 1 business hour — most no-cool calls are seen same-day with the price upfront.

Done guessing?

Warm vents tonight or cool house tonight — your call. Book now and a tech reaches out within 1 business hour.

60 seconds online · or call (206) 486-6373