Ok Geoff thx for the info, more investigations needed me thinks

Thx for the info Geoff. When you say sucked in at floor level, I have a opening with a removable cover (FIAMMA embossed on the cover), which has a hose connected to it which runs under the rear bench seat and then into the base of the fitted cabinet. Could this be the air inlet that draws the air in ...

I have a 2002 2.5V6 Bongo, my first campervan and not really mechanicly savvy. When I have the temperature controls on the front console set to ‘on’ (fan speed) and ‘rear’ (LED illuminated) and I operate the rear temperature controls, although the lights on the panel illuminate when functions are ...