I have a 2005 Ford Galaxy 1.9 TDi Ghia with twin air conditioning (separate air con unit in the left hand rear of the car).
I am suffering with a horrible smell generated from the vents at the base of this unit in the back, which is worse when heat is selected from it, and tends to be musty and sickly, bordering on hot plastic smell.
I have run 2 or 3 aircon de-odouriser treatments through this, but to no avail. I am aware of the bacteria that builds up, but this is different. It is spoiling the car and embarrassing when I have friends on board.
My last Galaxy was a 2003 LX version with manual single aircon - no problems there, but this latest system is electronically operated on the dash with overhead ducting in the roof lining too. Great for cooling the interior rapidly, but please, can someone out there tell me what is the likely cause of this, it is clearly something to do with the additional aircon system in the boot, but what?