Hi,
I know it's a long time ago but....
I regularly have this problem and to cure it you have to reset the computer.
Remove the IOD fuse from the fuse box, wait 5 seconds, then, replace it.
The red alarm light on the dashboard will be on and the heater will have reset itself. Put the key in the ignition and switch on (but don't start) and the indicators will flash twice.
Job done...
Jim.
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