Why do my evaporator coils keep freezing?

One of the most common causes of a frozen evaporator coil is lack of system airflow. If there isn’t enough air blowing over your evaporator coil, the coil won’t have enough heat to absorb. This will cause the condensation on the coil to freeze over. Dirty air filter.

How do you fix a frozen evaporator coil?

Give the Frozen Evaporator Coils Time to Thaw For your first step, turn the air conditioning system off and give the frozen evaporator coils a chance to thaw out. You can do this by shutting the unit off at the circuit breaker. Left to its own devices, it could take up to 24 hours for the coils to thaw completely.

How much does it cost to fix frozen evaporator coil?

Residential AC Evaporator Coil Replacement Cost Replacing a home air conditioner’s evaporator coil costs $1,000 on average with a typical range of $600 to $2,000. About 40% of the bill comes from labor, or $400 to $1,000. Warranties range from five to 12 years and cover the price of materials.

Can an evaporator coil be repaired?

What is the Process of Replacing the Coil? In order to replace the coil and fix your evaporator coil leak, a technician will need to recover the remaining refrigerant gas, and solder in a new coil after dismantling the air conditioner. A filter / drier must also be added or replaced to absorb moister and contaminants.

Will low refrigerant cause evaporator to ice up?

Running your HVAC system with low refrigerant levels creates unnecessary strain on your system and can cause ice to build up on your evaporator coils.

How do I know if my evaporator coil is frozen?

Signs of a Frozen Evaporator Coil

1. Your AC is not cooling.
2. Ice is present around the outdoor refrigerant line.
3. Your evaporator coil has condensation and/or ice forming on it.
4. The condensate drain line is clogged.
5. The condensate drain pan is overflowing.

How do you unfreeze an evaporator coil?

How do I know if my AC evaporator is bad?

A broken air conditioner may be a result of a faulty AC evaporator….4 Symptoms of a Bad or Failing Air Conditioning Evaporator

1. The cool air is weak or no cold air is blowing at all.
2. You notice a strange odor when using your AC system.
3. The AC compressor will not activate.
4. The AC temperature will vary.

What happens when evaporator coil goes bad?

If you take a close look at your HVAC unit, do you notice any frost on your equipment? This may be a sign that your evaporator coil has gone bad. When this equipment stops absorbing heat, the refrigerant will begin to freeze condensation onto your unit.

What to do when your evaporator coil freezes?

Then wait 3–4 hours to give your coils a chance to thaw out. After 3–4 hours, run your AC as normal again (switch your thermostat to COOL and AUTO) and see if that fixes the freezing problem.

What causes an evaporator fan to freeze up?

Fan blade was obstructed and stopped by frost or wires which led to more frost and freezing. Coil. Coil airflow was obstructed by debris or plastic. Product is stacked too close to coil obstructing airflow. Coil fins are badly damaged leading to a small area of freezing which in time grows in size.

Why does my air conditioner have a frozen coil?

One of the most common causes of a frozen evaporator coil is, believe it or not, a dirty air filter. You see, when a filter gets clogged with dirt and debris, it limits the amount of warm air that can pass through your air handler (where your evaporator coil is located, pictured below). Normally, warm air blows over the evaporator coil.

What causes the refrigerant in an AC to freeze?

Normally, warm air blows over the evaporator coil. But if a dirty filter is blocking airflow, the refrigerant will get too cold and cause moisture to freeze on the coils. If no warm air is blowing over the evaporator coil, the refrigerant inside the coil will get too cold.