Remarks on requests for fresh-air or recirculated-air mode in zone "4" of display group "014"

WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fresh-air/recirculated-air mode request code	Meaning	Remarks
00 (or 0)	No request for recirculated-air mode	Air conditioner in fresh-air mode (fresh-air flaps open, set to "fresh-air mode", recirculated-air flap closed)
10	Recirculated-air mode requested by Air Quality Sensor G238 (refer to display zone "3") Request is fulfilled by operating and display module, Climatronic Control Module J255.	Air conditioner in recirculated-air mode Fresh-air flaps closed, recirculated-air flap open
11 * See note	Recirculated-air mode requested by Air Quality Sensor G238 (refer to display zone "3") Request is not fulfilled by operating and display module, Climatronic Control Module J255. Recirculated-air mode not requested by Air Quality Sensor G238 (refer to display zone "3") * See note	As the "automatic air recirculation" function is not active (lamp in button for "automatic air recirculation" not lit), switching to recirculated-air mode is not effected despite being requested by the Air Quality Sensor G238 Air conditioner in fresh-air mode (fresh-air flaps open, set to "fresh-air mode", recirculated-air flap closed)
12 * See note	Recirculated-air mode requested by Air Quality Sensor G238 (refer to display zone "3") Request is not fulfilled by operating and display module, Climatronic Control Module J255. Recirculated-air mode not requested by Air Quality Sensor G238 (refer to display zone "3") * See note	As the compressor is not in operation, switching to recirculated-air mode is not effected despite being requested by the Air Quality Sensor G238 The request is no longer fulfilled as the compressor has been switched off (e.g. via ECON button) and more than 15 seconds have already elapsed since the start of the request. The request is not fulfilled as the compressor does not switch on (refer to display group "002") System in fresh-air mode (fresh-air flaps open, recirculated-air flap closed)
13 * See note	Recirculated-air mode requested by Air Quality Sensor G238 (refer to display zone "3") Request is not fulfilled by operating and display module, Climatronic Control Module J255. Recirculated-air mode not requested by Air Quality Sensor G238 (refer to display zone "3") * See note	As the air conditioner is in "Defrost" mode (lamp in "DEF" button lit), switching to recirculated-air mode is not effected despite being requested by Air Quality Sensor G238 System in fresh-air mode (fresh-air flaps open, recirculated-air flap closed)
Continued in next table

* Depending on the hardware/software version of the operating and display module, Climatronic Control Module J255, "11", "12" or "13" may also be displayed although the Air Quality Sensor G238 has not requested recirculated-air mode because of the air quality. Attention is therefore to be paid to display zone "3".

NOTE:

If recirculated-air mode has not been requested, "0" may also be displayed instead of "00".
To prevent possible misting-up of the windows, the "automatic air recirculation" function is limited to approx. 15 seconds when the compressor does not switch on.
In the event of a malfunction at the Air Quality Sensor G238, "automatic recirculated-air mode" cannot be implemented.
To clear misted windows as quickly as possible, air recirculation cannot be implemented in "defrost mode".
The purpose of the Air Quality Sensor G238 is to stop any short-term high pollutant concentrations (peak impacts) in the ambient air entering the passenger compartment. This is achieved by the operating and display module, Climatronic Control Module J255 switching the system from fresh-air to recirculated-air mode after receiving a request from the Air Quality Sensor G238.
If the pollutant level in the ambient air remains relatively high for a lengthy period, the Air Quality Sensor G238 starts to adapt to the change in ambient conditions by way of an adaptation program, with the result that a recirculated-air request is generally applied for less than 12 minutes given uniform ambient air pollution. In the event of several consecutive peak impact levels, the air conditioner may also operate in recirculated-air mode for a longer period.

Fresh-air/recirculated-air mode request code	Meaning	Remarks
20	Air conditioner switched to recirculated-air mode by way of "recirculated-air button" of operating and display module, Climatronic Control Module J255	Air conditioner in recirculated-air mode Lamp in "recirculated-air button" lit Fresh-air flaps closed, recirculated-air flap open
30	After cleaning the windshield with the wash/wipe function, the air conditioner operates in recirculated-air mode for approx. 10 seconds This is designed to prevent any cleaning agent odor ingress directly into the passenger compartment	Air conditioner in recirculated-air mode Fresh-air flaps closed, recirculated-air flap open
40	The air conditioner is in recirculated-air mode in order to attain the specified passenger compartment temperature required as quickly as possible at a high ambient temperature (increased cooling output) Increased cooling output is requested for example by the air conditioner if "Lo" has been set as specified temperature for at least one side on the operating and display module, Climatronic Control Module J255.	Air conditioner in recirculated-air mode Recirculated-air mode is maintained until the specified and actual passenger compartment temperatures have been assimilated to within a stipulated temperature difference Fresh-air flaps closed, recirculated-air flap open
50	Air conditioner switched off by way of Off button or blower - button (on vehicles with Air Quality Sensor G238) of operating and display module, Climatronic Control Module J255.	Fresh-air flaps closed, recirculated-air flap open
60	The operating and display module, Climatronic Control Module J255 has determined an operating status in which it is more appropriate for comfort reasons to open both flaps (fresh-air and recirculated-air flap)	Air conditioner in partial recirculated-air mode The air conditioner is in the process of switching from fresh-air to recirculated-air mode or from recirculated-air to fresh-air mode (the fresh-air or recirculated-air flap is opened before the recirculated-air or fresh-air flap is closed). Some of the air is drawn in from the passenger compartment and the rest via the dust and pollen filter.

NOTE:

The "partial air recirculation" function was introduced to provide greater comfort. The running sound of the fresh-air blower changes when the air conditioner switches over. The modified sequence (consecutive as opposed to simultaneous activation of the flaps) ensures a smoother transition.
The air conditioner may remain in "partial recirculated-air mode" for a lengthy period (for example to achieve good cooling performance in the case of high ambient temperatures without the system having to operate constantly in recirculated-air mode).
If recirculated-air mode has not been requested, "0" may also be displayed instead of "00".
To clear misted windows as quickly as possible, air recirculation cannot be implemented in "defrost mode".