F & R Window Heaters Not Working

[t-aslam]

Hi,

I have been a member for a few months but this is my first ever post. I own a ford galaxy 2005 1.9TDI 115 manual and have a problem with the front and rear window heaters; they do not switch on when the buttons are pushed and not even the light illuminates on the buttons. However if i turn the blower dial to front window then it switches the front window heater on automatically but i cannot switch this off (or on for that matter). I swapped the switches with the parking sensor switch (they are the same thing; essentially just an on/off switch) and they work perfectly fine illuminating and turning the sensors on/off but they will not function the window heaters. I have checked and rechecked the fuses but the fuses are fine and i have poked my head around the battery connections and cannot see anything wrong there either. I did have one of the AC pipes replaced a few months ago and to be honest the problem has been since then but the technicians claimed its unrelated. Could this be a relay issue or is it a wiring issue? Any help is appreciated. Thanks.