Audi Workshop Service and Repair Manuals > A4 Mk2 > Heating, ventilation, air conditioning system | Auxiliary heater | Aux. heater/heater booster

Block diagram of auxiliary heater

Note

t	For incorporation of auxiliary heater into vehicle electrical system, refer to → Current flow diagrams, Electrical fault finding and Fitting locations

t	Checking auxiliary heater components → Chapter

t	The various components (sensors) of the “auxiliary heater” wiring harness cannot be replaced separately at present.

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