The Grainfather probe is not a 3435 probe apparently. So the temperature curve for the STC 1000 (and 1000+) doesn't match exactly. Did you swap the probe?kaiserben said:Ah crap, sorry, I'd bought them for a Pi controller project. Got a bit mixed up with all the different controllers I'm playing with at the moment.
My Grainfather controller has a stainless sheath (and the controller is an STC200, which I've since replaced with a flashed STC1000.
As an aside, 3950 and 3470 10k thermistors are readily available on ebay. But they are not going to give accurate readings on an STC 1000. For those ordering a replacement or getting a 2nd probe in the case of flashing the 2 probe version, get the correct thermistor.