Thermostat
Set to cool, set point below the room temperature, fan on auto. Replace the batteries if the screen is blank.
Air conditioner stopped working? Get emergency AC repair help.
When the AC stops in hot weather, the building heats up fast and people can get sick. Check the thermostat and breaker, keep vulnerable people cool, then call 833-877-1717. RepairNowUSA connects the request. An independent HVAC technician does the repair.
Am I in the right place?Yes if the air conditioner will not turn on, has shut down, is blowing hot air, is iced over, leaking water or making a loud noise.
Is this urgent?Yes in hot weather, and especially when infants, older adults, people with medical conditions or pets are inside, or a business needs cooling. Signs of heat illness are a 911 call.
What do I do next?Do the quick checks below, then call 833-877-1717 with the ZIP code and what the system is doing.
Running but not cooling? See AC not cooling. Ice on the lines: frozen AC unit. Water leaking indoors: AC drain line. Commercial buildings: commercial AC repair.
RepairNowUSA editorial review · Last substantively reviewed October 13, 2026 · Review standards
Quick checks before you call
Breakers and switch
Check the panel for a tripped AC or furnace/air-handler breaker and reset it once. Check the service switch near the indoor unit is on. If a breaker trips again, leave it off.
Air filter
A badly clogged filter can stop airflow and freeze the coil. Replace it if it is dirty.
Do not open the outdoor unit or touch wiring or refrigerant lines. The capacitor inside can hold a dangerous charge even with power off.
Heat is a health emergency
Heat illness can become life-threatening. Signs include heavy sweating or hot dry skin, confusion, dizziness, nausea and a fast pulse. Call 911 for anyone who is confused or unresponsive, and move vulnerable people to a cool place while waiting for the repair.
What the system is doing tells the technician a lot
Won’t turn on at all
Thermostat, power, a tripped safety switch, or a failed control board.
Outdoor unit humming but not running
Often a failed capacitor or contactor. See AC capacitor repair.
Running but blowing warm air
Airflow, a frozen coil, low refrigerant or an outdoor unit problem. See AC not cooling.
Loud grinding, screeching or banging
Turn it off. A failing fan motor, blower or compressor can get worse. See AC fan repair.
What to have ready when you call
- Property ZIP code, home or business
- What the system does: nothing, hums, runs warm, ices, leaks or makes noise
- Indoor temperature and who is inside
- Whether the outdoor unit runs
- System brand and age, if known
- Whether any breaker tripped
What happens when you call RepairNowUSA
- Describe what is happening in plain words and give the property ZIP code. You do not need to know which trade to ask for.
- RepairNowUSA checks for a participating independent provider who handles AC and HVAC repair in that area.
- If one is available, you are connected. The provider confirms timing, access, scope and price with you before any work.
- The provider, not RepairNowUSA, diagnoses and performs the repair.
RepairNowUSA is a referral and connection service. Provider availability and response times vary by location, time and demand, and are not guaranteed. Before you approve work, ask what was found, the price, the timing and what is not included.
Call 833-877-1717Emergency AC repair questions
Can I call for emergency AC repair at night or on a weekend?
Yes. You can call 833-877-1717 at any time, including nights, weekends and holidays. Whether an independent provider can come out right away depends on your ZIP code, the time and provider capacity, so availability is not guaranteed.
My AC will not turn on at all. What should I check first?
Thermostat setting and batteries, the AC and furnace or air-handler breakers, the service switch near the indoor unit, and the air filter. Reset a breaker once only.
My air conditioner is making a loud noise. Should I turn it off?
Yes. Grinding, screeching, banging or a loud buzz can mean a failing motor, fan or compressor part. Turn it off at the thermostat and describe the sound when you call.
When is a broken AC an emergency?
During high heat, and especially when infants, older adults, people with medical conditions or pets are inside, or a business needs cooling. If someone shows signs of heat illness, call 911 first.
Do providers work on Carrier, Trane, Lennox and other AC brands?
Independent HVAC providers commonly work on major brands such as Carrier, Trane, Lennox, Rheem, Goodman, Bryant and York. Tell RepairNowUSA the brand on the call. RepairNowUSA is not affiliated with or authorized by any manufacturer, and warranty work may need the manufacturer’s own network.
How much does emergency AC repair cost?
The independent provider sets the price, which varies by area, time and the repair. Ask for the visit fee and an estimate before approving work.
Authoritative references
These public sources give general safety context. They do not replace an on-site evaluation, and RepairNowUSA does not perform the work.