I could not find a value for that.
Personally would not bother as: -Maybe i will try with a 10% more value to see if it will be better.
You are right. It works fine. One side of me was actually just like your thoughts and the other was go play some more. I think this is ok. Thanks for nice answer.Personally would not bother as: -
1. many thermometers, even digital ones can be +-1c out, just compare several together.
2. depends where in the cabin / air vent you measure the temp ?
Do not forget the NTC means Negative, so the higher the temp the lower its resistance.
If the next value NTC gives a swing too high the other way, you could try adding a 1k trimmer pot in series with the NTC, which might allow you to balance it better, but seems a lot of messy work for such a small difference.