Hi, new to site, can anyone point me in the right direction, had the mobile air medic round to top up air con, he says its ok but could not really check as wasn't working, and its an electrical problem with power feed. Ford main dealer also looked at it, took em all day, could not find problem, resorted to independant auto electrician, who said it was one of 4 things but 50% sure it was fan control unit (black box in front of battery), bought another unit, but still intermitten, he now reconds its a gas problem! car is 1999 2.0 glx. Help please before i go mad!! :( :( :(