- With the engine warmed up, open the heating regulator all the way - does the hot air flow evenly?
- Close the heating regulator completely - after a few kilometers, only cold air should come out of the nozzles, otherwise the air flaps will not close tightly.
- Does the up and down air distribution function?
- Is air flowing evenly from all openings?
- Is the air circulation regulator working?
- Does the blower operate at all speeds?
(The original article is posted at: FORDBOOK.ru)