If the cooling performance of the air-conditioning system in the above-mentioned vehicles is unsatisfactory, the installation of an air diffuser and an additional cable with resistor (for the evaporator temperature sensor) can remedy the situation.
When outside temperatures and humidity levels are high, inadequate cooling of air can occur as a result of unfavorable flow conditions. The evaporator then partially freezes up. This can be triggered by a negative characteristic of the evaporator temperature sensor.
Proceed as follows to rectify the problem:
Assisted by the additional diffuser, the air flow inside the evaporator box will be optimized, thus bringing about an improved cooling performance.
Installing a cable with resistor alters air-conditioning control and prevents the evaporator from freezing up.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
The reprinting, distribution, reproduction, exploitation in any form and 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, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.
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