Best answer: How does a car AC evaporator work?

Evaporator. The evaporator is located under the dashboard, and is in charge of cooling the air before it is blown into the interior of your car. Refrigerant liquid evaporates to a gas inside the evaporator. A fan then pushes that air across its cold tubes.

What does a evaporator do in a car AC?

The evaporator is like a mini radiator (not to be confused with the heater core — they are two separate things) inside the dash of your ride that gets cold as it further lowers the temperature of the refrigerant and, additionally, removes moisture from the air.

How do I know if my car 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.
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How do you know if your car evaporator is leaking?

The most noticeable sign of an evaporator leak is a strange odor coming from the AC. This odor is the smell of the refrigerant. The characteristic odor indicates that the refrigerant is leaking from the evaporator. Another sign of an evaporator leak is weak airflow.

How long does a car evaporator last?

If proper maintenance is regularly performed, then the evaporator coils should last 10 to 15 years, which is the ideal lifetime for an evaporator coil and comparable to the lifespan of an AC unit.

What does a car evaporator look like?

Evaporators are usually made of aluminum. They look like, and in fact are, similar to radiators, only thicker and smaller in overall size. Like radiators, evaporators consist of a series of internal tubes or “flow paths” with fins attached to them. Air can pass freely through the fins, just like a radiator.

Can car evaporator be repaired?

However, diagnosing and repairing a leaky evaporator is a highly labor-intensive process, and it does require a certain level of skill. For first-timers, we do not recommend trying to do it yourself; it is certainly best to call a professional to fix up your car A/C evaporator for you.

How do you test an AC evaporator?

To test the evaporator, follow these steps:

  1. Attach the AC gauge set to the service ports. …
  2. Add one can of refrigerant containing leak detection dye to the low-pressure side with your air conditioning running at the coolest setting.
  3. Let the car run for 15 minutes to circulate the refrigerant and dye.
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Where is the evaporator located in a car?


You’ll find this component right behind the dashboard. It’s in charge of cooling the air with the refrigerant before it is blown into the cabin of your vehicle.

How much does a car evaporator cost?

The average cost for AC evaporator replacement is between $952 and $1,213. Labor costs are estimated between $575 and $725 while parts are priced between $378 and $488. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.

How do you fix a leaking AC evaporator?

How do I stop my AC coil from leaking?

  1. Temporary fix: keep adding refrigerant. While you can keep your air conditioner in good working condition by adding more refrigerant, this is only a temporary fix and the most expensive in the long term. …
  2. Try using a sealant. …
  3. Replace the evaporator coil.

How does a evaporator work?

The main job of the evaporator coil is to cool the refrigerant so that it can absorb the heat. As the fan blows air over the coil, the refrigerant becomes cold and turns into a vaporous state.

Why is my car AC not blowing cold air?

The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.

Is it safe to recharge your car AC?

DIY A/C Charging Does Not Evacuate Old Refrigerant. The reason your car’s A/C system needs to be recharged is that, over time, the refrigerant gas that makes the system work will leak out of the system. … This can lead to overcharging the system, which can cause significant damage.

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