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Fiesta models have an electricaly controlled valve that controls the amount of hot water that passes to the heater matrix inside the car, they do play up a little. It is located beetween the rear of the engine bay compartment that is obscured by the platic that sits at the bottom of the windscreen. It's right in the midle. Should be easy to find as its clearly attached to the water pipes, (the pipe to the right), and has an electrical connector. Most of the time it is the valve itself, however it is possible that there is an electrical fault to blame, (rare, fords wiring is generaly good) so have a quick look at the wires and the connector to eliminate anything obvious before you go and buy a new valve. Mike out...

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16y ago

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