Coolant Temperature Sensor

[Guest summers]

;) I've got a berlingo 1.4i multispace petrol, and i'm having trouble with the coolant temperature sensor, I've had to replace it 3 times this year, can anyone tell me if there's an under lying reason for this? every time it goes wrong it runs rough, and drinks fuel like niagra falls, would be grateful if someone could shed light on the situation. thanks Summers2211

[techbod]

if the cooling fans cut in and it doesn't over heat it could be down to the thermostat sticking so a new stat wont harm and new coolant 50%50 mix