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how to run VW Polo Climatronic diagnostic self test error codes, air conditioning display test Press and hold ECON & RECIRC together then turn on the ignition key 444 02 Or press briefly ECON & RECIRC together displays error codes ? 444 00 Also tests all display digits
If there are no errors present, „444“ is displayed.
To clear the error codes: After the last code is displayed, (i.e. after „000“ is displayed), press and hold „ECON“ for at least 2 seconds. „444“ will be displayed as confirmation that there are no more codes present.
To exit the Internal Error Memory Mode: briefly press the „ECON“ button.