Can anyone help me.

Our Bora intermittently overheats.
The fan works sometimes then doesn't other times.
The mechanic replaced the thermostat thinking it could've been sticky, also the temp sender was replaced. Quite costly it was.

And now it's doing it again. Is there a fan relay or something similar that could be causing this problem?

I feel that I have a Fiat under the body.

As this is my Wife's car, she is ready to throw it off a cliff and buy a japanese car. Eeeeek.

Any help would be much appreciated. Friends and forums have all said that the Bora is generally bullet proof.