A frozen air conditioner is one of the most common problems that Suffolk County homeowners face in summer. A frozen AC is a genuine mechanical failure, usually caused by low refrigerant or a lack of airflow. If you see ice on your indoor unit or the refrigerant lines, you should shut the system down immediately and call a Long Island HVAC contractor for AC service.

Why Does Ice Form on an Air Conditioner?

Your air conditioner’s indoor coil requires a steady flow of warm air, and the right amount of refrigerant running through it. If either of these conditions is disrupted, the coil temperature can drop below freezing and condense the moisture in the air that touches it.

When an AC freezes, the problem compounds. Ice insulates the coil, preventing it from absorbing heat. This causes more ice to develop in an endless cycle.

The two primary causes of a frozen air conditioner include:

• Restricted Airflow from a Clogged Air Filter: As a precaution, shut your system down and check the air filter. If the filter is clogged, replace or clean it. You can check your owner’s manual to see which type of filter your system uses. Washable filters can be cleaned under cold water with mild detergent to dislodge dust and debris. Replaceable filters are widely available at any hardware or home supply store. Wait for the system to thaw, turn it back on, and check if it freezes again. If it does, call for AC service immediately.
• Low Refrigerant: If the filter looks clean and your system is still freezing, there could be a slow refrigerant leak. This causes pressure to drop in the coil, sending the temperature plummeting. Low refrigerant in a sealed AC system requires professional diagnosis and AC repair.

In some cases, a failed component could cause an AC to freeze, such as a faulty temperature sensor or seized relay. Do not attempt to diagnose the system. Opening your air conditioner could lead to injury or damage to the system. A licensed HVAC contractor can safely inspect your system, identify appropriate repairs, and get everything up and running again.

Why is the AC More Likely to Freeze on Hot Days?

Extreme heat causes the air conditioner to run continuously. This can push components that are already marginal to their limit. A filter that was borderline dirty becomes a major restriction on a hot day. Low refrigerant might not affect the system on a cool day, but will become a liability when ambient temperatures ramp up.

Humidity also plays a role. When there’s more moisture in the air, ice will accumulate faster.

Get Dependable AC Repairs in Suffolk County

A freezing air conditioner suggests a severe problem that you shouldn’t ignore. Even if thawing the system works temporarily, every time you start your system up, you are risking further damage.

You can get cost-efficient and dependable AC repairs in Suffolk County when you call Soundview HVAC. We are one of the most trusted heating and cooling contractors on Long Island.

Reach out to us at 631-209-1744 for any of your air conditioner repair needs today.