A bad evaporator is a problem with the cars heating and cooling system. However common, many people call an auto mechanic when their evaporator fails because it seems like a hard job. Instead of spending money to get it repaired, you can follow the steps below to easily do it by yourself.

1 – Acquaint Yourself with the Air Conditioning Evaporator

The auto air conditioning evaporator is found behind your dashboard, and it is integral to the car’s air conditioning and heating system. It cools and dehumidifies air in the passenger compartment of the vehicle.

Freon is passed through the bottom of the air conditioning evaporator as a low-pressure fluid. The coolant flows through the evaporator coils at 32-degrees Fahrenheit. A fan located behind the evaporator coils blows the cold air into the car.

The dehumidifying steps takes place when the warm air inside the car comes into contact with the cold evaporator surface. This warm air goes through the fins of your evaporator that makes the Freon coolant to boil. As it boils, it absorbs a great dael of heat. The ideal temperature for evaporator coils is 320-degrees Fahrenheit. On humid days, you will notice water dripping from under your vehicle; this is very normal.

When getting the vehicle serviced, having your evaporator checked should be included in your auto’s routine checkup and maintenance. In order to keep the engine from overheating, or if a leak check fails, the evaporator should be changed. You will smell a strange odor once you turn on your air conditioner. That smell is a good sign that the evaporator needs to be replaced. Replacing the evaporator needs you to remove your vehicle’s dashboard and center console.

2 – Get to the Evaporator

Disconnect the battery cables and wait a couple of minutes for the driver-side and passenger-side air bags to disengage. Take out  the inside instrument panel, steering wheel columns, glove-box door, instrument-panel cover bolts, left floor duct-pad screws and pad, steering column, ignition-shift-interlock cable, column wiring, air conditioning outlet duct, and the mounting bolts that support the brake pedal bracket to the column.

 3 – Bring out the Evaporator

Its now time to flush all coolant from the system and place the liquid into an approved recycling container. The refrigerant must be discharged before the evaporator can be remove because it is dangerous to remove parts when the refrigerant is still in the system. You must bleed, or discharge, the entire system first.

Take out  the liquid line connection that goes to the evaporator, and then same with the heater hose from the core. Next, remove the air conditioning and heating unit from under the dashboard, which is found under the instrument panel. Turn the unit upside down to remove the screws that hold it in place. Next, remove the center-adapter duct and the screws. Flip the unit back over to take the upper half of the “housing” off. Remove the evaporator from the lower housing case. Check for damage to the housing that holds the evaporator for any cracking or wearing, and be sure there are no missing pieces to the housing. Change any damaged or worn pieces.

4 – Replace the Evaporator

Finally, install the new evaporator system by following all the steps above in reverse order, and then fill the system back with coolant.