If the customer complains that the cooling power of the air-conditioning system in one of the aforementioned vehicles is insufficient, this may be due to a faulty pressure control valve in the compressor.
A faulty pressure control valve can often be identified by unusual high and low pressure: high pressure too low; low pressure too high.
However, before the electronically actuated valve is replaced, the controller, other system components and the coolant level should be checked.
To replace the compressor pressure control valve, proceed as follows:
The figure shows an example of an electronically actuated pressure control valve
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.
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