My daughters Octavia 2016 had some fault codes in Aux heater (#18) - a short circuit in Webasto water pump (correct, it was totally burned up inside - now replaced) that also was the reason for the second DTC - overheating. This puts the heater in "locked" mode.

 

I understand that I now need to unlock the heater and then erase the fault codes (reverse order doesn't work) before it can be used again. But I don't understand how to unlock the heater:

 

• Many people suggest "Adaption" and then channel 42. But this car/unit seems to use UDS and the alternatives are in a pull-down meny. Not channel number. A lot of different stuff and functions but no alternative as "Unlock heater".
• Other suggest to instead use "Basic Settings", and there really are an alternative "Unlock heater" ("Lås upp värmepaketet" in Swedish). But, if I select that (and hit "Go") I only get an error message saying something like "Error: Wrong order or circumstances" (free translation from Swedish...😉)
• I've also tried (and succeeded) to login, the box/knob down to the right, before trying "Adaptation" or "Basic Settings". But no more alternatives at "Adaptation" and still get the same error message when trying "Unlock Heater" at "Basic settings".

 

What am I doing wrong.....?

 

(Picture showing how it looks in "Adaptation" and the pull-down alternatives instead of channel numbers):

Edited 24 September, 20241 yr by Ingper

Hi! (eller hej!)

 

Did you ever solve this? I got the exact same problem and would really appreciate some help.

Yes !

Go to "Basic Settings" instead and then select "Disengage heater". Not anything else. Not obvious....🙄

 

That will unlock the heater (work with all cars with MQB platform ?) and the DTC's will be possible to erase - if not already gone.

Edited 27 November, 20241 yr by Ingper