Smells From Heater And Air Conditioner Unit - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
Noises (refrigerant hammering) occur immediately after the air
conditioning is switched on and/or in a curve or when the brakes
are applied:
– Discharge refrigerant circuit, evacuate and charge again (too
much refrigerant in circuit).
Note
Excess refrigerant oil in the circuit may also cause this problem
♦
(e.g. if the refrigerant oil level was not checked after the air
conditioner compressor was renewed). In case of this com‐
plaint, the refrigerant circuit must be purged with R134a re‐
frigerant ⇒ page 67
The refrigerant must be drained from the air conditioning com‐
♦
pressor. To facilitate this process, turn the air conditioner
compressor over by hand at the poly V-belt pulley or coupling
disc of the magnetic coupling. Then fill refrigerant circuit with
total amount of refrigerant oil (50 g direct into air conditioner
compressor) according to ⇒ vehicle-specific workshop man‐
ual .
Water sprays out of the air vents (dash panel or footwell) although
the air conditioning system otherwise works properly:
– Check that the condensation water drain is properly routed; it
must not be pinched or kinked.
– The condensed water drain valve must not be hindered in its
operation by wax or underbody sealant and must open and
close properly.
– Check the plenum chamber cover; it must be undamaged and
be installed correctly (no water must flow into the evaporator).
– Check water drains in plenum chamber; they must not be
blocked (e.g. by leaves).
8.2 Smells from heater and air conditioner
unit
8.2.1 Is the smell coming from evaporator or
the heat exchanger?
♦ Fishy smell
– 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.
♦ Smell of a burnt clutch
♦ Vapours from foot mats, retrospectively installed seat covers
etc.
♦ Putrid, mouldy smell
– Due to accumulation of leaves, pine needles etc. in plenum
chamber.
Air conditioning system with refrigerant R134a - Edition 10.2014
.
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8. Complaints