AC Blowing Warm Air — What To Do
Why Is My Air Conditioner Not Cooling Enough?
An AC that runs but doesn’t cool usually points to airflow restrictions, incorrect thermostat settings, dirty coils, duct leaks, refrigerant loss, or failing components. Safe homeowner checks include replacing the air filter, confirming thermostat mode, opening vents, clearing the outdoor unit, and checking the drain. Refrigerant and electrical issues require certified handling and may affect insurance. For symptoms, safe steps, and red flags, read the detailed guide below.
AC won't turn on
When an AC won’t turn on, start with safe basics: verify thermostat mode and batteries, wait for built-in delays, check breakers, the outdoor disconnect, the indoor service switch, and replace a clogged filter. Look for ice or a full condensate pan that can trip a float switch. Avoid repeated breaker resets and do not bypass safeties; many insurers and warranties require licensed HVAC diagnosis. For details and a step-by-step checklist, read more below.
Loud or noisy air conditioner: causes and fixes
Why your air conditioner gets loudA healthy air conditioner makes a steady whoosh and a soft hum. When that turns into rattling, buzzing, screeching, or banging, the sound is a clue that something is loose, worn, obstructed, or out of balance. In general, indoor systems run around 40–60 dB, and out…
AC fan runs but compressor won't start
AC fan runs but compressor won't start: what it meansWhen the outdoor fan spins but the AC compressor is not turning on, the system can’t move heat out of your home. You’ll feel warm air at the registers, the thermostat will never hit setpoint, and energy use may climb. This symptom points to an el…
AC Keeps Shutting Off by Itself (Short Cycling)
Why your AC keeps turning off after a few minutesIf your air conditioner keeps shutting off by itself, you are likely experiencing short cycling. That means the system starts, runs briefly, and then stops before reaching the set temperature. Short cycling wastes energy, drives up utility bills, str…
Why Is My AC Frozen and How to Fix It
Why is my AC frozen?A frozen air conditioner happens when the evaporator coil and refrigerant lines drop below freezing while moisture in the air condenses and turns to ice. That ice blocks airflow even more, driving temperatures lower and creating a feedback loop. Most freeze-ups trace back to two…