Hi Rach,
The heater control valve has failed (common fault) easy DIY fix, four pipes and an electrical connector, it's mounted at the rear of the engine bay near the windscreen wiper mechanism, cost for valve £25 and 1hr to fit
nigel, May 2009
The heater on off valve on these is electrically operated, and are prone to failure. Follow the heater pipes to the inside of the car, the valve is on the bulkhead.
