If the following symptoms are observed in the above vehicle:
The parking heater switches itself off automatically after a short time and the passenger compartment fan switches on. While the motor is running the parking heater functions perfectly as an auxiliary heater.
Error code 1410 “Heating unit overheated” is read out from the OBD error memory for the parking heater.
One reason for this might be a fault in the electrical circulating pump. The flywheel may become separated from the shaft and cause the pump to lose performance. No error entry is made for the circulating pump because the pump motor is running.
In this case, the circulating pump must be checked and replaced if necessary.
Please do this by following the disassembly and reassembly instructions from the vehicle manufacturer.
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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