My son has a 2017 Octavia S with standard heating controls and air conditioning.  The air conditioning isn't working on any of the blower settings nor does the engine tone change when he puts the car into reverse or presses the air recirculation button.  Apart from the obvious re-gas solution (which may or may not work), is there anything we can check beforehand that could be the cause of the problem?  Thanks.

First try re-calibrate the flaps as per the video in this thread

 

 

3 hours ago, nbramwel said:

is there anything we can check beforehand that could be the cause of the problem?

Does one of the radiator fans come on when the a/c is switched on? (even on a cold engine)

4 hours ago, nbramwel said:

 nor does the engine tone change when he puts the car into reverse or presses the air recirculation button.

 

It doesn't, that's the point of the contant drive modulated compressors used. The fist test is a code read, if nothing comes up then the most likely fault is the compressor because they are **** by Sanden and we fit Denso which last longer.

3 hours ago, Paws4Thot said:

Does one of the radiator fans come on when the a/c is switched on? (even on a cold engine)

There's only one fan

In case if AC is not cooling air (but rest works), forum members are already helping with ideas...

 

In case, if blower is not working, that's how it was on my 11/2016 Octy (Climatronic with Valeo items; there's version with Denso items too):
   cabin blower turned off from time to time, no reaction to speed change, absurd reaction to speed change, sometimes blower was loud.
Same was with AC on or off, same in Auto or Manual mode.
And again- everything started to work fine, but problems came back after time.
Replaced blower and it sorted problems. I took cheapest Thermotec blower (blower control module was included in scope) and for 1 year it still works ok.

Replacement can take ~10min (for advanced hands) and minimum-to-no tools are required.

Cause of problem is hiding in weak construction of brushes. At least, for Valeo blower it's for sure.

 

Edited 20 June, 20241 yr by indars
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