In alt.home.repair, on Mon, 7 Dec 2020 04:45:02 +0000, Donnell Spivey
wrote:

How do I caliber my thermostat that go down to 32

This is not twitter. You can give some details. What kind of
thermostat is it? What's it intended for? How do you use it? What's
the brand and model number?

If it's a heating/cooling thermostat, I'd fill the house with ice and
try different temperatures until I found the highest one that didn't
make the ice melt much.