In the course of a longer journey made in one of the above-mentioned vehicles (with the air-conditioning running at full speed), it is possible that the cooling capacity of the air-conditioning system begins to diminish. A reason for this can be the freezing of the evaporator.
Another sign indicating this problem is the presence of a layer of ice forming on the low pressure line.
Possible causes of this trouble are faulty temperature sensors on the evaporator and also an uneven distribution of air flowing through the evaporator.
This problem can be solved by renewing a sensor that has to be correctly adjusted (including its resistance) and by replacing the interior filter to achieve improved air distribution.
- BP8P-61-J6X Filter set with diffusion plate
- BPY-61545A Wiring harness with resistance
In these cases the following adjustments are recommended by the vehicle manufacturer.
Figure 1
Figure 2
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
Not helpful at all
Very helpful