Ok – the bad news.
Measured resistances, and sadly, they don’t add up.
Looking towards the pins (bottom common)
bottom to top left – 7.3 ohms
bottom to top right – 13.1 ohms
top left to top right – 10.2 ohms
Readings taken cold (but not freezing unfortunately!)
So I presume it’s bye bye TC115. 🙁
Dug out the manual this morning and found the receipt with it.
Bought on 8 August 1978 for £129.75.
That was an expensive freezer then, but after 31 years and 3 months, I think you’d agree it was pretty good value.