I am hoping that you may be able to point me in the right direction please.
I have a 03 1.6 petrol Zaffy. The coolant temp guage on the L/H side of the dash is not registering all of the time. Sometimes it will show between 70°-80° but at other times nothing.
I am getting hot air via the heaters and water is being pumped round the system.
I thought that it might have been the thermostat but am not convinced.
Is there a sender unit that feeds the temperature back to the guage or is it likely to be a dodgy gauge?
Suggestions please and thank you.