Why is my Ford S-Max experiencing engine temperature fluctuations?

I recently noticed that my Ford S-Max's engine temperature is fluctuating between hot and cold. Should I be concerned and how can I fix this issue?

It sounds like your thermostat may be malfunctioning. I would suggest taking your car to a qualified mechanic to have it checked and possibly replaced if necessary.

Have you checked your coolant level? Low coolant can also cause temperature fluctuations.

I had a similar issue with my Ford S-Max and it turned out to be a faulty temperature sensor. Better get it checked just in case.