Frozen Evaporator Coil in NJ? Why It Happens and How to Fix It

A frozen evaporator coil is one of the most common reasons an AC stops cooling in North NJ. You will usually notice weak airflow, warm air, or water dripping after the ice melts. The cause is almost always airflow or refrigerant related.

Why the coil freezes

• Dirty air filter blocking airflow
• Closed or blocked vents starving the system of return air
• Dirty evaporator coil restricting heat transfer
• Low refrigerant from a leak
• Blower motor issues reducing airflow

What to do right away

1. Turn off cooling and set the thermostat to Fan only.
2. Replace the air filter.
3. Let the coil thaw for 2 to 4 hours.
4. Check that all supply and return vents are open.

If the coil freezes again, you need a technician to check refrigerant and airflow.

When to call a professional

• The coil freezes repeatedly
• You see ice on the outdoor lines
• The system runs but does not cool
• Airflow is very weak even with a new filter

Air2Cool provides same-day AC repair across Morris County and North NJ. Call (201) 787-5657 or request service.

Also see: Preventative Maintenance