cab heater randomness

temeraire

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Hi, The heater in my 2018 T6 Kombi doesn't seem to obey the temperature I set it to.

I'll set it to a sensible temperature and it will be fine for a short while then it will blow out super heated air and I have to turn it right down and it will be OK again for a bit, then it will blow out really cold air. No matter where I set it to it will eventually either become super hot or super cold.

Any ideas? is there a temperature sensor somewhere that has gone haywire?

I've read the threads on the blower resistor and the t6.1 servo control arm but those don't fit my issue.
 
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