Heating and ventilation, auxiliary heater - function check

AP83.00-P-8351G

Heating and ventilation, auxiliary heater - function check

15.7.96



Inspecting



The coolant temperature should be approx. 50°C.

Danger!

Risk of accident from vehicle starting off by itself when engine running. Risk of injury as working around the engine during start-up or while running may result in contusions and burns

Secure vehicle to prevent it from moving off by itself.
Wear closed and close-fitting work clothes.
Do not grasp hot or rotating parts.

AS00.00-Z-0005-01A

1

Start engine

2

Open hot water regulating valve (3).

 Pay attention to ease of movement when operating the hot water regulating valve (3) or the heating and ventilation flaps.

3

Check blower by operating rotary switch (1), check all settings and check that warm air comes out of the heating and ventilation nozzles

4

Open and close windshield air flap using lever (4) and footwell air flap using lever (2).

5

Open and close the vents (5) for fresh air direct ventilation

6

Check auxiliary heater

AP83.00-P-8351-01G

7

Close hot water regulating valve (3), switch off blower and switch off engine

8.1

Check heater booster system by pressing the heater booster button (8) on the lower control panel.

 Only on models 461.302/ 332/ 342/ 345 with engine 612.966.

The heater booster is switched on, when the outside temperature drops to below
8 °C and at the same time the coolant temperature is less than 70 °C.