Dismantling and assembling auxiliary heater (version “2”, vertical installation) — AUDI
Dismantling and assembling auxiliary heater (version “2”, vertical installation) on Audi: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
Dismantling and assembling auxiliary heater (version
“2”
, vertical installation)
Note
Removing auxiliary heater
Chapter
Detaching and attaching add-on components
Chapter
1
Housing with heat exchanger
Not to be dismantled
Remove combustion residue from combustion chamber prior to assembly (clean)
Affixing auxiliay heater rating plate in line with auxiliary heater design (for
“Petrol”
or
“Diesel”
)
Chapter
2
Burner element with
combustion air blower
V6
Checking
Chapter
Removing and installing
Chapter
Dismantling and assembling
Chapter
Affixing auxiliay heater rating plate in line with auxiliary heater design (for
“Petrol”
or
“Diesel”
)
Chapter
Do not pull on impeller of combustion air blower to remove
Chapter
Can only be pulled out of housing following removal of
glow plug for heater
Q9
Chapter
3
Top part of housing with intake air duct
4
Bolt
5
“Auxiliary heater”
wiring harness
With various sensors
Version for vertical installation
6
Cover for auxiliary heater sensors
Holds
temperature sensor
G18
in position in auxiliary heater
Detaching and attaching
Chapter
7
Hexagon nut
Special collared nut
8
Hexagon nut
Self-locking, replace
For attachment of wiring harness earth connection
9
Glow plug for heater
Q9
With internal heater coils
Checking
Chapter
Removing and installing
Chapter
10
2-pin connector
To
circulation pump
V55
11
Heater overheating fuse
S24
Checking
Chapter
Removing and installing
Chapter
Part of wiring harness, cannot be replaced separately
12
Auxiliary heater earth connection
Current flows back via this connection from glow plug to
auxiliary heater control unit
J364
Check for corrosion (contamination) and firm attachment to housing
13
Temperature sensor
G18
Checking
Chapter
Removing and installing
Chapter
Part of wiring harness, cannot be replaced separately
Positioned directly in coolant and sealed off from housing by way of an O-ring
14
O-ring
Replace
15
2-pin connector
To
combustion air blower
V6
Inserted in burner element
16
Flame monitor
G64
Checking
Chapter
Removing/installing and checking
Chapter
Part of wiring harness, cannot be replaced separately
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.