A/C and heat issue with button
Thread Starter
Newbie
Joined: Aug 2023
Posts: 2
Likes: 4
From: Boston
GLC63 AMG
A/C and heat issue with button
When I press button to change from feet to straight on to defroster it doesn’t change. I have to run through the 8 cycles 10+ times before it actually goes to defrost window
MBWorld Fanatic!
Joined: Aug 2023
Posts: 3,886
Likes: 1,206
From: MA Coast
W204 2010 C300 4matic Sport M272
Maybe the contact/switch underneath is getting stuck and not returning to its original position. Im not really sure how they work, but try to see if the button is just floating in there and not being fully depressed, if that makes sense. Maybe dirt, dust, wear.
Out Of Control!!
Joined: Apr 2019
Posts: 12,272
Likes: 6,918
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
Faulty AAC actuators
You'll need a scanner or Xentry to figure which of these modules has developed poor connections.
The fix to replace faulty modules can be labor intensive ... a temporary workaround is to try to exercise them using the HVAC controls.
🤞
