Frozen AC Coil: Causes and What to Do
Ice on your air conditioner is a sign that something is wrong. Here is what causes a frozen coil and the safe first steps to take.
It may seem strange to see ice on an air conditioner in the Las Vegas heat, but a frozen evaporator coil is a fairly common problem. When the coil gets too cold, moisture in the air freezes on it, and airflow drops.
Left alone, a frozen coil can lead to poor cooling and added strain on the system.
Signs of a Frozen Coil
- Ice or frost on the indoor coil or the refrigerant line
- Weak or warm airflow from the vents
- Water dripping around the indoor unit as ice melts
- A system that runs for a long time but does not cool
Common Causes
- Restricted airflow. A dirty filter, blocked return vent or closed supply vents can keep warm air from reaching the coil.
- Low refrigerant. A leak lowers pressure in the system, which can make the coil too cold.
- Dirty coil. Dust and debris on the coil reduce heat transfer.
- A failing blower fan. Weak airflow lets the coil get colder than it should.
Safe First Steps
- Turn the AC off at the thermostat so the coil is not producing more cold.
- Switch the fan to on, if your thermostat allows it, so air moving over the coil helps it thaw.
- Check the air filter and replace it if it is dirty.
- Make sure return and supply vents are open and unblocked.
- Let the ice melt fully before turning cooling back on.
Do not chip or scrape the ice, since this can damage the coil.
When to Call a Technician
If the coil freezes again after you have checked the filter and airflow, there may be a refrigerant leak or a mechanical problem. A technician can find the cause, and our refrigerant recharge service addresses the leak before the system is recharged.
For other causes, our AC repair service starts with a full diagnosis.
Frequently Asked Questions
1. Why is there ice on my air conditioner? Ice usually forms when airflow is restricted or the system is low on refrigerant, which makes the coil too cold.
2. Can I run my AC with a frozen coil? It is best to turn the cooling off and let the coil thaw. Running it frozen can strain the system.
3. How long does a frozen coil take to thaw? It can take several hours, depending on how much ice has formed. Running the fan can speed things up.
4. Will a frozen coil come back? If the cause is a dirty filter, replacing it may fix the problem. If it returns, a technician should check for a leak or airflow issue.
Get Help with a Frozen AC Coil
Call Vegas Cool AC Repair and we will find out why it is freezing. Call 702 216355928 to schedule your appointment with Vegas Cool AC Repair today.
Learn more about our AC repair in Las Vegas and AC refrigerant recharge services.
