I have this issue on my 06 407. noo heat ondriverside but heat on passengerside. if you are unable to change the temp on one swide but not the other then the heater flap is broken in the dash. easy cheap fix if you do it yourself. check videos on YouTube that show cutting of a hole in the side of the heaterbox and epoxy resin cord to join the rod back to the flap.
Sorry I dont have an answer but it is a major problem with 407's. Its time for Peugeot to admit that they have a cock-up on this one.
Check the electrics
yes
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Procedure to reprogram a lost keyfob for a Peugeot 407 sw 2007
5.25l
in the trunk
To find a cheap Peugeot 407 you may look in the newspaper or even maybe a used car dealer. You possibly may be able to find a Peugeot 407 cheap through Craigslist or a number of other online resources.
Weare the location
In the fuse box
The Peugeot 407 estate is considered fairly reliable. Although this car is reliable, the car itself isn't as aesthetically pleasing to the eye as one might hope.