Mk7 Fiesta - Heater Problem!

JAMIE-TYPERV6

Octane Boostaholics
Hey all,

Not sure if anyone can help, but I've a Mk7 (2010) Fiesta sport van (1.6 tdci) and it's developed a very annoying heater issue in the last week (just as the mornings have gotten cold)

From cold in the morning it will warm up and start to blow hot air... after about 5 mins it will then turn cold... and then hot again after another 5 mins of cold. I assume it probably an interior temp sensor/thermostat... but does anyone have any experience with these or have a definitive answer on how to fix?

Cheers,

J.
 
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