Audi A4/A5/A6/A7/Q5/Q7/TT - Loss of power in heating/air-conditioning systems | HELLA
Audi
A4/A5/A6/A7/Q5/Q7/TT
Model years: 2011 – 2014
Loss of power in heating/air-conditioning systems
Should the vehicles mentioned above experience a loss of heating and/or air-conditioning power, water entry into the wiring harness may be the cause.
Due to defective coolant control valves (heating, transmission), coolant can leak and enter the connectors and wiring. This results in electric defects and corrosion. Other defects will frequently occur throughout:
- Coolant warning lamp flashes
- Motor temperature high
- Motor goes into emergency mode
- Error code P2753/P2755
For eliminating the problem, check all coolant valves with their plugs and electric lines and replace where necessary.
The following vehicle models can be affected:
Model: year:
A8
2010 - 2013
Q7
2011 - 2013
A5 convertible
2012 - 2014
TT
2012 - 2014
A4
2012 - 2014
Q5
2012 - 2014
A5
2012 - 2013
A6/A7
2012 - 2013
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