Heater on Fiesta X Reg Zetec S 1596cc year 2000
The Hot Cold control doesn't have any effect on heat from the heater. When the weather is hot the heater blows hot air, when the weather is cold the heater blows cold air both conditions irrespective of hot cold control position. There is no AirCon in the car.
Is this more likely to be the heater control valve or heater control circuit board?
Is there a way to check?
Where is the heater control PCB located?
Thanks