SEAT Workshop Service and Repair Manuals > Leon Mk2 > Heating, ventilation, air conditioning system | Supplementary heating | Aux. heater/heater booster | Notes on general repairs on vehicles with auxiliary heaters | Starting conditions for auxiliary heating (preheater)

Starting conditions for auxiliary heating (preheater)

t	Engine type OK (diesel/petrol)

t	Terminal 15 (ignition) on

t	Engine speed > 300 rpm.

t	Coolant temperature < 69 °C

t	Ambient temperature < 5 °C

t	Reserve fuel level not reached

t	On-board network manager not active

t	No crash shut-off

t	No fault entries blocking start procedure

Note

The AC button has no influence on operation of the preheater.

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