The evaporator is removed for replacement in the event of a fault.
The evaporator is installed in the block of the cabin heating and air conditioning system.
The evaporator is made of aluminium tubes with external fins.
Passing through the tubes of the evaporator, the boiling refrigerant actively absorbs heat from the air blowing over the outer surface of the tubes.
The air is cooled and supplied to the vehicle cabin.
We prepare the vehicle for the work.
We remove the heater, as described in the article – Removal and installation of the heater Renault Duster
We withdraw the cabin filter from the heater housing
We remove the heater blower
With a Torx T-20 key we unscrew two screws
We remove the radiator pipe holder
With a Torx T-20 key we unscrew the screw
We remove the heater radiator pipes
With a Torx T-20 key we unscrew the screw and release three retainers
We withdraw the heater radiator
With a Torx T-20 key we unscrew three screws in the lower part of the heater
With the same tool we unscrew two screws on the left side of the heater
We unscrew the screw located in the recess below the heater blower additional resistor
We unscrew the screw in the front part of the heater
We release two clips in the front part
We release one clip in the rear part of the heater
We separate the left and right parts of the heater housing
Having peeled off the foam seal, we remove the evaporator shield
We withdraw the evaporator from the right part of the heater housing
With a 4 mm hex key we unscrew two screws
We remove the plate and the expansion valve
The evaporator pipes are sealed in the expansion valve by rubber rings
If the rings are deformed, we replace them
We install the evaporator in the reverse order. We charge the air conditioning system.
Servicing of the air conditioning evaporator
In the evaporator, during the operation of the air conditioning, moisture from the air condenses, and in the dampness fungal spores, mould and dangerous microbes multiply rapidly.
All this can cause diseases of the human respiratory tract.
Microorganisms accumulate especially abundantly on the damp surfaces of the evaporator if the cabin filter is not installed.
To reduce the health risk it is recommended to clean the evaporator once a year.
For the work, a preparation for cleaning car air conditioners with an extension hose and a compressor will be required.
In order to avoid damaging the radiator when performing the following operation, do not supply air pressure above 3—4 bar.
We blow the cooling system radiator and the condenser from the engine compartment side with compressed air from the compressor.
Through the grilles of the radiator and the bumper we wash the condenser from the outside with water at minimum pressure, so as not to damage its cells.
We blow the condenser again with compressed air.
This procedure has an effect only if performed regularly.
In some cases the procedure has to be repeated several times, especially if the condenser has not been cleaned for a long time.
To make the work more convenient, the front bumper can be removed.
If the condenser is very heavily soiled (when it is, for example, clogged with hardened mud), the cooling system radiator can be removed.
It is permissible to wash the dirt out of the condenser cells with a soft paintbrush.
We shake the can with the air conditioning cleaning preparation vigorously and, holding the can vertically, treat the evaporator with foam through the condensate drain tube.
During the following operation there must be no people or domestic animals in the vehicle cabin!
We start the engine.
We switch on the air conditioning system, set the maximum rotation speed of the electric fan of the climate installation and close all the windows.
We leave the vehicle cabin and close all the doors for 10 minutes.
After 10 minutes we switch off the engine and ventilate the cabin.
