In vehicles from the series listed above, it is possible that the air-conditioning system suddenly stops working.
A defective coolant thermostat may be the possible cause for this failure. It is controlled electronically/has an electric heating resistor.
If the error codes P0171 and P0597 (thermostat heating, electric circuit interruption) are stored in the error memory of the electronic control unit, the air-conditioning system is "deactivated" as a precaution.
Proceed as follows to rectify the problem:
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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