Peugeot Boxer key fob.

I have a 2011 AS Cotswold, it has a Peugeot Boxer cab etc.   The Peugeot key fob has the usual three buttons, on my Cotswold the top button unlocks the cab doors, the middle button locks the cab doors and the bottom button does nothing.
I thought that the bottom button should lock/unlock the side habitation door ?
When I say that the bottom button does nothing then that is not 100% correct because when it is depressed I can hear the drivers door lock click but it neither locks it or unlocks it, it just clicks.
Has anybody any ideas what the correct operation of the key fob buttons should be ?
Thank you in anticipation.

Hi Similar key fob and the top button does as yours as does the middle one, bottom button does indeed unlock just the habitation door and also there is a noise from the cab doors but as with yours no actual effect on them

Thank you rgbr.    Does your key fob bottom button also lock the habitation door remotely as well as unlock it ?  
Or do you have to physically insert the habitation door key to lock it but use the bottom button to unlock it ?

Middle button locks everything, double push activates dead bolts. Top button opens cab bottom button opens sliding and rear doors on my van conversion

Thank you woodlice for your reply.

It’s as I thought and understood from the handbook. So it would appear that I have something else to add to my ever increasing list of items that need attention by the dealer before my warranty expires.

Thanks again.

Thank you Paul for the suggestion, I shall do that once I return back home following my travels.
I would imagine that with the use of a multimeter I should be able to  detect a voltage when operating the lock via the key fob.

I think that you are right in both instances Paul in that it is a combination of misalignment due to vibration/temperature changes and oxidation of the contacts. 

The solenoid on the habitation door is operated directly and requires quite a decent current pulse to activate such that any contact resistance causes a problem. 

Ideally a relay should have been used and that would make it far more tolerant to a bit of extra series resistance but that would cost more money and we all know that AS can’t afford that!

As such I always carry around a scrap of very fine sandpaper for the purpose whilst on the road.

Regards Graham

I can finally report a happy ending to this thread.    We returned the Cotswold to the dealer for investigation.
They came back to us and said that the Cotswold did not have central locking on the habitation door so can I come and collect the van asap.    I couldn’t understand why the key fob had three buttons including one for the habitation door.   So, armed with information suggested by you guys I telephoned Autosleeper directly.   They said “of course it has central locking”.
I telephoned the dealer and suggested that they look a little harder and lo and behold, about an hour or so later they called and said that they had found a broken wire to the door frame contacts and the habitation door is locking from the key fob just as it should.
Perseverance and forum know how has once again won the day, so may I thank those of you who contributed suggestions in helping me to achieve this result.