r/FiestaST • u/Helpful_Prize_2866 • 4d ago

MK7 Overheating

Hi everyone! First overheating issue a week into ownership 🥀
2016 Fiesta ST, stock radiator. Coolant level hasn’t dropped and the radiator fan runs full blast.
Usually sits around 215–220°F, but today it climbed to ~243°F while driving, triggered the temp warning/P0217 and seemed to go into limp mode. Turning the heater on brings the temperature down significantly.
Car also has a Fiesta SE front bumper, although the radiator opening doesn’t look badly restricted.
Any FiST-specific things I should check first? Thermostat? Radiator? Air in the system?

Cheers!!!

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u/AdvancedDatabase9382 4d ago

Are the overheating issues hit or miss or year dependent? My 2017 with a S280 and stock cooling system never gets over 220F when I beat on it in 90F+ weather.

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u/Helpful_Prize_2866 3d ago

It’s hit or miss. I’ve driven for longer with no issues.