Volkswagen Touran Quiz
Heating, Ventilation and Air Conditioning

Odor from the Heater and A/C Unit

In this manual: Heating, Ventilation and Air Conditioning
General Paint Information — 130Towing Guide — 4Wheel and Tire Guide Information — 111Electrical System — 104Heating, Ventilation and Air Conditioning — 106
~2min read

Odor from Evaporator or Heat Exchanger?

Fishy smell
From leak at cooling system of engine or of A/C system heater core.
Note If the fishy smell gets weaker when the temperature is set to "cold" and stronger when it is set to "warm", then check the heat exchanger for leaks.

Smells like a burned clutch.

Evaporation from floor mats, decorative seat covers, etc.

Musty smell

Due to various contaminants, such as leaves, pine needles, etc. collecting.
Note

Clean the plenum chamber.

Due to water that cannot drain out of the plenum chamber.
Note

Check that the plenum chamber water is draining.

Odor from the Heater and A/C Unit

Note Odors originating in the heating and A/C unit can mainly be detected in fresh air mode and recirculated air mode.
Due to too much condensation water in A/C unit.
Note Check the condensation water drain. Refer to → Rep. Gr.87 in the vehicle-specific Repair Manual.
Due to an old or heavily contaminated dust and pollen filter.
Note Check the dust and pollen filter. Refer to → Rep. Gr.80 in the vehicle-specific Repair Manual.
Due to deposits on evaporator fins.
Note Clean the evaporator using the Ultrasound A/C Cleaner -VAS6189A-. Refer to → Chapter "Ultrasound A/C Cleaner -VAS6189B-" or the Suction Feed Spray Gun -VAG1538- and a suitable spray nozzle. Refer to → Chapter "Evaporator, Cleaning with Suction Feed Spray Gun -VAG1538- and Spray Nozzle".

Ultrasound A/C Cleaner -VAS6189B-

The Ultrasonic HVAC Cleaning System -VAS6189A- is placed in the front passenger footwell and sprays Aero-Clean. Aero-Clean neutralizes microbes and bacteria inside the heater and A/C unit.

The unit comes with Operating Instructions.

Evaporator, Cleaning with Suction Feed Spray Gun -VAG1538- and Spray Nozzle

Spray off the evaporator directly with Contra Sept using a spray nozzle (approximately 10 bar (145 psi)). Contra Sept neutralizes microbes and bacteria directly on the evaporator. To make it possible to access the evaporator, some prework and different spray nozzles are needed, for example VAG1538/5;VAG1538/6 orVAG1538/7. A vehicle-specific instruction booklet is included with the evaporator cleaning solution D 600 100 A2

Test yourself

A quick Volkswagen Touran quiz: every answer comes with an explanation and a link to the manual page.