As in title, no hot air, no vent control, no dash lights on heater panel, no light on aircon button (not eatc old manuel)cuts out with glow plug flashing, may be every 5 mins may be every hour. Disconnect -ve batery terminal for 5 mins reconnect everything listed apart from heat and reculation light now works. Could last 5 mins could last days, no cutting out. I know when its going to do it as with side lights on the illuminations around the heater controls flash and then go out. Please help i get frozen in this weather.

Job done at last, taken months. heater control unit replaced, all faults cured including glow plug flashing and stops. Unit is behind the 3 heating controls on dash, loads of electronics, devil to change. £20 of e-bay.

Glad you got it sorted

well done...glow plug flashing appears to be a fault warning on those mondeos...not necessarily related to glow plugs!