Hello,
I installed a VW Webasto auxiliary heater from a Golf 5 shortly after purchasing my Scirocco in March 2010... The wiring was done according to the wiring diagram from a Golf 6... It worked well until the display on the dashboard, because the heater couldn't be programmed/activated... But I don't mind because I just switch it on and off using the remote control or the buttons on the climate control unit.
Now, just before it got really cold, the heating's electric pump suddenly failed... This caused a whole bunch of errors, including emergency shutdown and locking, due to overheating... Everything was fine and understandable up until that point... Portable heater is no longer used and is only used as a supplementary heater (functioned smoothly).
Yesterday, I installed a new pump and started a test run using VCDS. Everything seemed to be working fine... so I thought.
This morning, it started up on the remote control and, 15 minutes later, only the fresh air fan was running

. Once the ignition is turned on, the heater then starts as a supplementary heater... Now I've been searching for 20 minutes and re-filled the lines, but it didn't work...
Somewhere, in a measurement, it still said 'Trial run successful' = Nio. But I couldn't get rid of that. What needs to be done for that?
And another thing I noticed is that for one of the readings, the heating system has something labeled 'Personalization,' and it says 'Ventilation' instead. Normally, you can adjust this on the dashboard, but that's not possible for me?!? Maybe that's the issue?
Would appreciate a response.
Best regards
Marc