Cooling off
Set the thermostat to off. Setting the fan to on helps it thaw faster.
AC freezing up, with ice on the coil or refrigerant lines?
Ice on an air conditioner means air or refrigerant is not flowing correctly. The system stops cooling and can damage the compressor if it keeps running. Turn the cooling off, let it thaw, then call 833-877-1717. RepairNowUSA connects the request. An independent HVAC technician finds the cause.
Am I in the right place?Yes for ice on the copper lines outside, frost on the indoor unit, or water pooling as ice melts.
Is this urgent?Yes. Running a frozen system can damage the compressor. If anyone shows signs of heat illness, such as confusion, dizziness, nausea, or hot dry skin, call 911 and move them somewhere cool.
What do I do next?Thermostat to off, fan to on to thaw, catch melt water, and call 833-877-1717.
Water from melting: AC drain line. Low refrigerant: refrigerant leak.
RepairNowUSA editorial review · Last substantively reviewed October 13, 2026 · Review standards
Thaw it safely
Catch the water
Towels and pans around the indoor unit. Melting ice can overflow the drain pan.
Change the filter
A clogged filter is one of the most common causes.
Do not chip at the ice
Scraping or chipping ice can puncture coils and lines. Let it thaw, which can take several hours.
Why AC units freeze
Dirty filter or blocked returns
Not enough warm air across the coil.
Low refrigerant
A leak lowers coil temperature below freezing.
Blower problem
See blower motor.
Dirty coil
See evaporator coil.
What to have ready when you call
- Property ZIP code, home or business
- Where the ice is
- Filter condition
- Whether this happened before
- Any water leaking
- System age and brand
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 frozen AC 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 833-877-1717Frozen AC questions
Why does an air conditioner freeze up?
Ice usually forms when not enough warm air crosses the indoor coil, such as with a dirty filter or blocked return, or when refrigerant is low. A technician needs to find the cause, or it will freeze again.
What should I do while the AC thaws?
Turn cooling off at the thermostat. You can set the fan to on to help it thaw. Put towels under the indoor unit, because melting ice can overflow the drain pan. Do not chip at the ice.
How long does it take to thaw?
Often a few hours, depending on how much ice there is.
Can I call at night?
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.
Authoritative references
These public sources give general safety context. They do not replace an on-site evaluation, and RepairNowUSA does not perform the work.