| Is the smell coming from evaporator or the heat exchanger? |
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| Due to leak in engine's cooling system or in heat exchanger of heater and air conditioner unit. |
Note | If the fishy smell is weaker when the temperature is set to „cold“ or stronger when the temperature is set to „warm“, check the heat exchanger for leaks. |
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| Smell of a burnt clutch |
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| Vapours from foot mats, retrospectively installed seat covers etc. |
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| Due to accumulation of leaves, pine needles etc. in plenum chamber. |
Note | –
| Use water so that it cannot flow out of plenum chamber. |
Note | Check water runoff points in plenum chamber. |
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| Smell from heater and air conditioner unit |
Note | Smells that can originate in heater and air conditioner unit can be detected in fresh air mode and in recirculation mode. |
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| Due to too much condensation water in heater and air conditioner unit |
Note | Check the runoff points of condensation water → Rep. gr.87 as indicated in the vehicle-specific repair manual. |
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| Due to an old or very dirty dust and pollen filter |
Note | Check the dust and pollen filter → Rep. gr.80 as indicated in the vehicle-specific repair manual. |
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| Due to deposits on the fins of the evaporator |
Note | Clean the evaporator, using the ultrasonic air conditioner cleaning unit -VAS 6189A- → Chapter or the suction feed spray-gun -V.A.G 1538- and corresponding spray lance → Chapter. |
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