followign from this thread
http://www.network54.com/Forum/15639/thread/1241940664/Heater+playing+up%2C+on+then+off-+Please+look+in
i have a 1.2 2001 bravo
The collant was leaking and i have sealed this now to prevent any more leaks
the garage did this for me over the weekend.they wodulve topped up the necessary liquid.
this morning, in heavy rain the heat did come on but after a few motorway miles cold air was back
i cannot check as its still raining...nor can i check the collant (hot engine)
any ideas what this may be?